you mean wheeljack?
Not TOOOOO clear there :b
to get the back wheels off, I would recommend the use of a souldering iron. Heat upthe pins for about 30-40 seconds (may need more) and the wheels (and pins) pop right off!

I've actually already got one wheeljack in the works for my classics display - so I'm looking forward to yours!

I'll look for the pin removal tute and get back to you