Hi guys. i'll try to explain my problem to the best of my ability in english. I've made a 3d printed cnc in the hope of later on mill the openbuild plates in 10mm cast acrylic so i can upgrade for a openbuilds type machine. i have a cnc arduino shield v3 + tb6560 drivers + nema17 94oz.in with grbl 1.1f. i use sketchup and export dxf to openbuilds cam. so this is my problem: before i do any cutting i always do prototype of the thing i want to cut just to see if the measurements align properly and then a cut the final product. so i've downloaded a v slot gantry for my 2040 v slot aluminium rail into skecthup and then export it as dxf to openbuilds cam.when i do this and after cutting i realize that the wheels are so far apart that is impossible for both to make contact with the alluminium and even the plate seems a few mm smaller. i believe that in the process of exporting the dxf the measurements somehow get buggy or there is a problem when i download the gantry into sketchup, i dont know, it seems that sketchup file does not have the correct measurements in mm. at this time i'm really lost, i didnt want to go by trial and error trying to guess the right measures and design a plate from scratch cause that would be time consuming. maybe there is someone here that had the same issue or alike. can any of you guys help me?