new to nitro

[rc10fan]

Hi guys was hoping some one can answer a few questions please?

I have a hyper 7 an old one and one of the clutch shoes has broke. I think it has the original plastic type. I have found a few on the net and they all seem to be alloy. Are these better i take it ? any help would be great thanks.

The engine i have is a l.collari innotech xs2200 .21cc Im told they are some of the best engines about or were. i cant find them anymore. Anyone know anything about them ?

Last question i wanted a good starting point for the diff oils. I was thinking 5000 in the rear 7000 in the middle and 10000 in the front ?

Im used to 1/10 electric and wanted to stiffen up the suspension so i was thinking 40w rear 35w front ?

thanks guys