[jerry56]

I was thinking about a cutoff wheel on a dremel as well....it's about the only thing small enough to get in there.... but that is "real" steel in them thar Nylints.. so it might take some time....
As for drilling mounting hols I was just going to put them over the wheel assemblies front and rear I think there is enough room to drill 4 or so holes on each side where the sides come up to form the wheel wells
I think you would need to take off about 4.5mm.... Doing that to the plastic would be easy but a little tougher on the metal ones...and you still might have to cut the frame down...
I guess for the fronts you could use some aluminum angle but you would have to cut some of the frame away to keep the ride height the same.