LR 2.5 3D printer

LR 2.5 is the evolved [LabRat 3D Printer](https://www.thingiverse.com/thing:4087426) . Printing volume 180 x 180 x 180 mm3.
In this new configuration the quality and speed of printing has increased over LR. I have printed at 0.05 layer height (Marvin), at 150mm/s (box lid) and Benchy at 100mm/s.
I did use all component from LR (except 2x150 profiles) and extended the printer to I3 configuration. There are three iteration :
A. Y carriage from LR (single 2020 V slot profile);
B. Y axis 2040 or 2x2020 V-slot, Y carriage 3 wheels .
C. Y axis 2040 V-slot profile and Y carriage with bed support, 4 wheels. Remix of [Tevo Tarantula Bed Support_V2](https://www.thingiverse.com/thing:2832758).
Also Y motor mount is modified and added a new X carriage with wheel spacers and belt holders integrated and wheel tensioner with eccentric.
I used the same 180x180 bed from LR printer. Extruder Pitan and hotend V5 clone.
For assembling, the profiles being stacked, doesn't need to be cut precisel