JA L / TestGrid - History

Add BTU mod for the REVC top (#22)

* Remove V3 and V4 bearing tops based on REVA top

- The ball used in newer Ploopy trackballs doesn't fit in the REVA top -
it's just slightly too big.
- I've designed an updated BTU mod for the REVC top, which should work
fine with the older ball.

* Move README images to img/ subfolder

* Add blank REVC STEP and STL files

- These are the official Ploopy Top REVC, edited to remove the bearing
sockets.
- The idea is that these can be used for any future mods to use
different bearings.

* Add REVC versions of the BTU top STEP and STL files

* Rename v4 BTU mod FreeCAD file to match naming scheme

* Remove FreeCAD file for v4 BTU top

- It's not really relevant any more as it only works for the smaller
ball

* Add REVC BTU top mod to the README

- Also explains that the v3 and v4 ones can still be found in the commit
history

Update BTU mod documentation (#19)

* Clarify differences between BTU mod V3 and V4

- Added description
- V4 has now been tested so removed warning
- Added better image of v3
- Added image of v4

* Update printing and assembly recommendations

- The repo's wiki has much better 3D printing recommendations
- Previously was missing any mention of the M3 threaded inserts which
should be used. Now added and the wiki is also linked for those.

Add BTU modification (#18)

* Add files for Ploopy top without bearing sockets

- These files were created in Rhino by deleting the surfaces that made
up the bearing sockets and patching the holes that were left
- This is a good base for the BTU top or any other mods people want to
make

* Add BTU mod top piece v3

- This is the first full version of the BTU mod I created.
- v1 and v2 were just test pieces that mounted to the front screw
holes of the trackball to check clearances. They weren't really a
usable top as they didn't have anything other than the ball well.
- This part has been test printed on an Ender 3 and works well.

* Rename STEPs folder to STEP

* Add BTU mod v4

- This is a full remake compared to v3, which was designed in Rhino. To
make it more accessible for contributions, it's been redone in
FreeCAD. This means you can edit it with a free program as well as
making it parametric. The positions of the BTUs can be edited by
changing the values in the spreadsheet embedded in the CAD file.
- These parts haven't yet been test printed

* Add README for BTU mod

* Add more detail to mod README

- Print and assembly tips
- Some images to show what the mod actually is and what to cut off the
secondary buttons

* Rearrange bearing distributor list

- It didn't need to take up so many lines
- Also added Bosch's contact locator tool to make it easier for people
to find other distributors, as suggested by /u/d4baller