For this mod the following linear guides are required:

X axis: 1 x 350 mm MGN12 rail and 1 carrriage block MGN12H.

Y axis: 2 x 365 mm MGN 12 rails and 3 carriage block MGN12C.

Z axis: 2 x 310 mm MGN 12 rails and2 carriage block MGN12H.

Assorted screws M3, nuts M3 and M3 tnuts for frame 2020 (Z axis), I'm sorry for not specifying the exact hardware but I no longer have the printer with the full mod. I made this mod in 2022.

I add various x-idlers mounts:

• Prusa Pulley with his tensioner.
• Zaribo Pulley with his tensioner

The X motor mount and the X Idler mount can be printed in two versions, with and without supports in the housing of the linear carriages. (I Prefer with supports its more beautiful parts)

Ztop pieces: there are two versions: The basic ztop and the ztop to connect led bar.

I add three alignment tools: Z axis rails, Y axis rails and Build helper Z 93mm.

The builder helper Z 93mm is an essential tool to complete the Prusa calibration with the original firmware. It is required to move the H-bridge back a distance of 93mm using this tool.

When my friend installs this full mod on his prusa bear, I will provide all the data regarding screws, nuts and tnuts.

Note:

Y rail mod is not mine, I found it in Telegram groups, I didnt find the creator. I add this mod for complete the XYZ full mod.

X rail mod is based on CM3D of Telegram (I actively participated in the mod) and now I have gone a step further by implementing Z linears rails.

Z axis mod is totally new with Ztop basic and Ztop led bar.

Enjoy tuning your Prusa Bear if you have enough courage for it!!!