Upgraded gearbox?

[Don1]

So, after a few years of running the gearbox at near its limits with power, and sticky tyres, it's starting to complain.

What options do I have please?

1) Rebuild
2) Rebuild with upgraded parts?
3) Replace

Has anyone done 2 or 3?

I'm hoping that it will hold together for the summer and I can go from there.... Cheers!

[Don1]

Cheers all!