diff --git a/README.md b/README.md
index 4d43af8..bfc76fb 100644
--- a/README.md
+++ b/README.md
@@ -153,8 +153,9 @@ Any options that are not specified when calling `setup` will take on their defau
   },
   -- The repl plugin with which to interface
   -- Current options: "iron" for iron.nvim, "toggleterm" for toggleterm.nvim,
-  -- "molten" for molten-nvim or "auto" which checks which of the above are 
+  -- "molten" for molten-nvim or "auto" which checks which of the above are
   -- installed
+  -- (start_line, end_line, repl_args, cell_marker) -> boolean (success)
   repl_provider = "auto",
   -- Syntax based highlighting. If you don't want to install mini.hipattners or
   -- enjoy a more minimalistic look
@@ -204,6 +205,8 @@ keymaps on the plugin configuration or even map them on they Hydra mode as long
 as you take heed of the [advice given above](#current-limitations).
 
 - `move_cell(dir)`: Move up or done a cell in the `u`p or `d`own direction.
+  - `D` to move to the first non-empty line of the next cell, likewise `U`
+  - `e` to move to the last non-empty line of the next cell, `E` for previous cell
 - `run_cell(repl_args)`: Run the current cell. You may optionally pass a table
 of `repl_args` that will be forwarded to the repl. For the details of what is
 forwarded exactly and how it is used check `repls.lua` and look for your repl
diff --git a/doc/NotebookNavigator.txt b/doc/NotebookNavigator.txt
index be37209..043a2de 100644
--- a/doc/NotebookNavigator.txt
+++ b/doc/NotebookNavigator.txt
@@ -184,6 +184,8 @@ Default values:
     -- Current options: "iron" for iron.nvim, "toggleterm" for toggleterm.nvim,
     -- "molten" for molten-nvim or "auto" which checks which of the above are 
     -- installed
+    -- or provide a function with signature 
+    -- (start_line, end_line, repl_args, cell_marker) -> boolean (success)
     repl_provider = "auto",
     -- Syntax based highlighting. If you don't want to install mini.hipattners or
     -- enjoy a more minimalistic look
diff --git a/lua/notebook-navigator/core.lua b/lua/notebook-navigator/core.lua
index c563c35..65e9925 100644
--- a/lua/notebook-navigator/core.lua
+++ b/lua/notebook-navigator/core.lua
@@ -7,17 +7,26 @@ local M = {}
 M.move_cell = function(dir, cell_marker)
   local search_res
   local result
+  local mod = dir:sub(2, 2)
 
-  if dir == "d" then
+  if dir == "d" or dir == "D" or dir == "e" then
     search_res = vim.fn.search("^" .. cell_marker, "W")
     if search_res == 0 then
       result = "last"
+    elseif dir == "D" then
+      vim.fn.search("^\\w", "W")
+    elseif dir == "e" then
+      vim.fn.search("^\\w", "bW")
     end
   else
     search_res = vim.fn.search("^" .. cell_marker, "bW")
     if search_res == 0 then
       result = "first"
       vim.api.nvim_win_set_cursor(0, { 1, 0 })
+    elseif dir == "U" then
+      vim.fn.search("^\\w", "W")
+    elseif dir == "E" then
+      vim.fn.search("^\\w", "bW")
     end
   end
 
@@ -125,7 +134,7 @@ M.run_all_cells = function(repl_provider, repl_args)
   local buf_length = vim.api.nvim_buf_line_count(0)
 
   local repl = get_repl(repl_provider)
-  repl(1, buf_length, repl_args)
+  return repl(1, buf_length, repl_args)
 end
 
 M.run_cells_below = function(cell_marker, repl_provider, repl_args)
@@ -133,7 +142,7 @@ M.run_cells_below = function(cell_marker, repl_provider, repl_args)
   local cell_object = miniai_spec("i", cell_marker)
 
   local repl = get_repl(repl_provider)
-  repl(cell_object.from.line, buf_length, repl_args)
+  return repl(cell_object.from.line, buf_length, repl_args)
 end
 
 M.merge_cell = function(dir, cell_marker)
diff --git a/lua/notebook-navigator/init.lua b/lua/notebook-navigator/init.lua
index 797d291..7d4afe9 100644
--- a/lua/notebook-navigator/init.lua
+++ b/lua/notebook-navigator/init.lua
@@ -221,11 +221,13 @@ local function activate_hydra(config)
   local hydra_config = {
     name = "NotebookNavigator",
     mode = { "n" },
-    config = {
+    config = vim.tbl_extend("force", {
       invoke_on_body = true,
       color = "pink",
       hint = { border = "rounded" },
-    },
+      buffer = config.buffer,
+      desc = config.desc,
+    }, config.hydra),
     body = config.activate_hydra_keys,
     heads = active_hydra_heads,
   }
@@ -267,6 +269,8 @@ M.config = {
   -- The repl plugin with which to interface
   -- Current options: "iron" for iron.nvim, "toggleterm" for toggleterm.nvim,
   -- or "auto" which checks which of the above are installed
+  -- installed
+  -- (start_line, end_line, repl_args, cell_marker) -> boolean (success)
   repl_provider = "auto",
   -- Syntax based highlighting. If you don't want to install mini.hipattners or
   -- enjoy a more minimalistic look
@@ -318,7 +322,9 @@ M.setup = function(config)
   if #utils.available_repls == 0 then
     vim.notify "[NotebookNavigator] No supported REPLs available.\nMost functionality will error out."
   elseif
-    M.config.repl_provider ~= "auto" and not utils.has_value(utils.available_repls, M.config.repl_provider)
+    M.config.repl_provider ~= "auto"
+    and type(M.config.repl_provider) == "string"
+    and not utils.has_value(utils.available_repls, M.config.repl_provider)
   then
     vim.notify("[NotebookNavigator] The requested repl (" .. M.config.repl_provider .. ") is not available.")
   end
diff --git a/lua/notebook-navigator/repls.lua b/lua/notebook-navigator/repls.lua
index 3a22137..810daf9 100644
--- a/lua/notebook-navigator/repls.lua
+++ b/lua/notebook-navigator/repls.lua
@@ -70,8 +70,10 @@ local get_repl = function(repl_provider)
       chosen_repl = repls[r]
       break
     end
-  else
+  elseif type(repl_provider) == "string" then
     chosen_repl = repls[repl_provider]
+  elseif type(repl_provider) == "function" then
+    chosen_repl = repl_provider
   end
 
   -- Check if we actuall got out a supported repl