Made some modifications to make it more rigid as aluminum and carbon fiber are materials of choice here.
Corner block I lowered nut trap, so I can get a little more tension on it before the PLA breaks. Middle Z I made taller and longer also has the brace across the top. Z flex seems to happen here alot. Milled some 3mm aluminum nema brackets on it(made on this machine), as the existing PLA ones couldn't handle the tension. Extended the Roller F lock out to try and minimize gantry flex, keep it square. Plus the roller locks always broke Changed to a 15HDT belt system, has a steel ply layer. To much wobble in the 6mm GT2 belt, which added to the chatter Using 3 x TB 6560 3amp, two in parallel to running full amps on X/Y Used supplied RAMPS 1.4 on a i3 Prusa build Using GRBL 0.9 on Freetronics Arduino Cheap 400W spindle, I dont recommend as its not quite powerful enough. Using 2 flute HSS endmil 2mm-6mm
More pictures here