Thanks

@Rebellion13 - Making them "better" is all part of the fun.

@borealis - I stuck the shaft in an electric drill and used a file.

@WhiteWolf McBride - This is the old WSN version and the suspension seems OK.

"I note that this is being checked with the tank dead empty, no battery, not even the upper body/turret on." - the batery is in (it's hidden under the small circuit board), I tried it first without the top on then again with the top one (not point putting the top on until I know it worked).