Tune up kits

[Trenchrunner]

I'm looking to learn internal maintenance for v2 tm type gearbox and am thinking about getting a relitivrel cheap tune up kit. The reason is because all the parts should be designed to fit and will help me learn my way around the gearbox.

Any tips on what to go for or if it's actually worth it? Maybe I should do my research and get all the parts separate? I've heard good things about lonex so would I be able buy all the parts and they will work? Or mix and match through researching best matches?

Lots of questions but lots to learn I guess! Just trying to save me some time and money if anyone can help me out.

Cheers,
Bill