It was just less effort to sand, was about 1mm, barely noticeable, but yeah either or. Sanding the old 190 was the idea as I didn’t know if I’d even use it much, I didn’t.
The issue was bad fuse/mast tolerances, I couldn’t link more than 2 or 3 waves on the vyper 190 where i was having no trouble linking 5-10 on progression. Put it down to wonk on the connection as pumping was a pain - short clip, if the pump was very neat then fine, but if any wonk to the pump it was super hard to recover… discussed further here