KdxChode
When you say have problems shifting do you mean it is stiff like above?, or finds a neutral in between gears? or what I suspect doesn’t quite make it & stays in the lower gear? - which would indicate possibly a shimming problem. Gearboxes are neat things but can cause all sorts of problems if misaligned
Gears don’t quite make it in, or jump back out, which undercutting can often help.