Just wanted to ask if the rubber CV boot covers they sell are worth investing money into? Do they actually prolong the amount of time in-between servicing and rebuilding them (not that it's hard or anything).

Also, one other question. I accidentally threw away the gearbox "Diff bolt cover (part 6575). I thought it was left over plastic when I cut out the T-nut. Anyway, would you guys waste your money on buying a Diff bolt cover (covers the head of the allen bolt) ?