Traceur PS3D Tweaks

Wanted to add slight improvements to an already awesome blaster. I have printed the original but had a few issues. Thankfully Chance offered the STEP files so I could easily help out and add these minor improvements.

Let me know what you think!

Deeper heat insert holes, grips combined with lower, longer front catch on upper, deeper nose slot, trigger smoothing for switch interface, micro switch holes for added variety, curved trigger cover option.

I also reorganized the STEP file to be component specific and gave everything names.