This is a dual direct drive X carriage for 10mm X axis using double wide linear bearings. LM10UU or (Misumi LM10UW). It is based on 9mm GT2 belts but should work with 6mm belts.
It was intended to use magnets for a quick change out but the magnets were not strong enough.
It does use magnets on the fan mounts which do work. Your printer needs to be calibrated for proper press fit of magnets and some screw holes. Be prepared to drill out some holes if they are too tight. Glue the magnets in if they are too loose. It uses 6mmx3mm magnets and 5mm x 10mm. You need various m3 screws up to 25mm, two m3x60mm and one M4x16mm.
This can be used as a dual Bondtech BMG direct drive carriage, Dual bowden, or hybrid bowden-direct.

BOM
Blower 4020 1ea
4010 heatsink fan 1ea
M3x60mm 2ea
6mm x 3mm magnet 12ea (4 needed for fan 8 optional for LMU)
5mm x 10mm magnet 4ea
M4x16mm 1 ea
M3x20mm 7ea (part fan 3 ea, belt 2ea, Chimera mount 2ea)
M3x25mm 3ea (Chimera 3 ea) 
M3 x 16mm 2ea(HS fan 2ea) 
Bondtech BMG 1ea
Bondtech BMG Mirror 1ea
Bowden npt fitting 2ea
Bowden  tubing about 65mm 2ea
Nema17 pancake motor 2 ea

830grams AUW

designed for: .6 nozzle, .3 layer height, 3-4 walls, 20-40% infill ABS for most parts.

Designed by railgunner
fan shroud from thingiverse
This started as a Voron 1.5