MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
I finally have my vacation and have had time to start up this project again, and it is definitely a resolution thing. With a 0.4mm nozzle of the i3 slicer is set to first layer 0.45mm so what I ended up doing is editing your model and slightly widening the tips and it worked beautifully, with the tolerances the grips still slide freely. A brim would probably been worth a shot also, gotta keep that in mind, this has been a learning experience. I have almost completed it only pins remaining, interestingly i would not need them for the rail bodies, that was press-fit tight in tolerances.