Losi XXX shocks on Mad Monkey

[Pacman]

Just bought some Losi XXX shocks for my Mad Monkey and I would like to overhaul them before fitting them. I have a few questions regarding what parts to fit and what set-up for Grass track with jumps:

- What are the best value O-rings to fit, e.g. Originals (LOSA5014) or after market?

- To replace scratched shock shafts are there any alternatives to the Losi shafts (e.g. LOSA5060) worth considering?

- What grade oil should I use front and rear?

- What pistons? Either Losi or an alternative? So far I've found the following from Losi:
Black #57 LOSA5045
Red #56 LOSA5046
Orange #55 LOSA5047
Blue #54 LOSA5048

- I've read on another thread that it's best to fit Losi pink springs at the rear and blue/black at the front. Has anyone tried anything else?

Cheers