LinuxCNC S-Curve Accelerations

I'm not really in a position to do any testing on hardware right now (I no longer work in a router shop.) but I can offer links to some G-code that I used in the past to help with testing the circular arcs tool planner when it was being developed. They are some 2.5-D V-groove engraving tool paths. They are in inches and need to have approximately +/- 0.003 of precision in the movements to look good. The first file is only XYZ moves, the 2nd file has XYZW to run a 2nd engraving spindle on a 2 headed router.

 

​​​​​​​ 

I'll attach one simple spiral planing operation gcode file. In my machine this brought up the toolpath blending problems in tp1, I had to roll back into tp0 (haven't tried tp2 though). I could not get the machine to move smoothly, tried different blending settings but no help (tp0 blends this just fine). Unfortunately didn't have time to investigate any further but maybe simulation shows something?