New arms, interchangeable with the laser cut version, printing in PETG.

This version of the cam arm increases the compression stroke and allows for a parallel paddle position, but it does not compensate for the variable volume we have now during compression.   

The variable rotation/delivered volume is complicating the PID loop we are using for our flow sensor feedback. We intend to compensate for the current non-linear flow with an inverted non-linear cam profile curve, but I haven't figured that out yet.  This is not for lack of trying though..