The steerings not that bad. It wore as the plastic parts pivoted on the screw threads so it got a bit sloppy but it still went left and right. I only replaced mine with the MIP setup when the threads had gone in the chassis holding the bolt in place so the whole assembly started rocking from side to side, and that was after years of use.
Replacement 48dp spurs are easy, 1/2th and 1/10th pan still use exactly the same standard spurs all these years later. But if you are nailing down a full spec for the class including gearing it's only going to cost one 32dp pinion instead of a load of 48dp spurs.
Even the early Schumacher full spike and blocks were on 2" wheels, the RC10 uses 1.6" rear wheels which is why the upgrade was a set of holiday buggy tyres. The alternatives that fit that are available are Tamiya Rough Rider and Frog tyres.
Minispkies were around late 80s, but minipins didn't turn up until the early 90s. If someone is looking at Schumacher minipins then you might as well go the whole way and get a set of 2.2" RC10 wheels from JC Racing.
I'm with Jimmy on this, run them standard as that makes it simple. If you want to change this and that because it makes it better/easier to drive or faster then you are missing the point Jimmy is making.
If anyone wants to open the class up to all makes, if you stick with 83/84/85 when this was released then your options are RC10, Scorpion, Frog, Rough Rider and Super Champ. Bring the cut off date just up to to 87 and these RC10 rereleases will get beaten by
race built Ultimas.