[Solved]Unable to stop the spindle fully, stutters 7i96/7i76 Folinn Bd600 0-10v

Thx to all for the help and great suggestions.
I managed to fix it by doing the following:
-Added a ceramic capacitor 0.022uF to the FWD +ve (pin 6) and Gnd (pin 5)
-Added a ceramic capacitor 0.022uF to the REV +ve (pin 8) and Gnd (pin 7)
-Adjusted the OUTPUT_SCALE in the ini as there was a very slight RPM range change (<3%)

I got the idea from looking at some wiring diagrams where this was suggested for a 0-10V signal.
​​​​​I also added a capacitor to the 0-10v signal at the Mesa board to avoid future issues.

A couple of things I learnt
-There's so much I don't know.
-Ceramic capacitors generally don't have a polarity.
-my oscilliscope couldn't see to the resolution the VFD can hence I couldn't see the noise.
-I probably could have used halscope and turned up the sample rate, hooked up a jumper between the FWD or REV signal and an input and watched it.
-What I thought I'd tested I hadn't.  I've used a number of the same shielded cable, and when I tested pulling the plug on the VFD and Mesa board I must have done the Encoder and VFD board.  Testing it once more (pulling the right cable) stopped the VFD FWD/REV oscillation.
-TIP I've put a different colored tape at the ends of each multi core shielded wire so I can quickly make the cabling association (my VFD is in a control box on the other side of my mill).