Quickshifts

[MiiTCH]

Not likely, all that's happening is you're moving the relative pivot points on the gearbox/linkages. If you make it that short you have to force it into gear though then yes, you can damage the box long term.

Sounds more like the box/clutch is f*cked if you have difficulty getting it in gear.

At one point it would randomly be really hard to get in gear, and sometimes crunch a little, so I changed the cable and its never done it since, but it can still be a little stiff when going into the gear

my car has done 88k and the clutch has never slipped?