Oh yes i just noticed its a twin sided swing arm, jeeeeeeeze its been years since i road on this antiquated system. (ps my 640 SMR was a pain in the ass to refit rear wheel) single sided arms rule.
Sounds like you just need to be a bit more committed to the change, don’t pussyfoot it just engage it positively, works extremely well I find.The quickshifter seems to be a lot more complicated than I expected. It seems to be a two step process. The first gentle push activates the throttle blip / throttle kill, then pushing further causes the gear change. The correct timing of the two to get a smooth shift varies quite a lot depending on throttle setting and RPM.