Belt clamp and nut holder for reprapworld metal carriage

I upgraded my Prusa i2 with a [metal carriage](https://reprapworld.com/products/extruder/cold_ends/metal_carriage_v1_0), which I bought at reprapworld.com. The printed carriage got severely deformed after several years. The mounting holes of the belt clamps for the metal carriage are less far apart (10mm) than that of the original prusa i2 (18 mm). So I tweaked Josef Průšas files to create a belt clamp that fits the metal carriage. I have uploaded two photo's of the old printed carriage as a tri