[Overdriven]

The other problem with extending the hingepin holders is the dogbone itself. Not the length of the dogbone, but the dogbone hitting the holder. In stock form, the hingepins are located very close (vertically) to the pivot point of the dogbone, where it doesn't move at all. But approximately 1.75" (approx amount per side you'd have to extend a buggy) from the diff cup, the dog bone is moving up and down a significant amount and must be taken into account to avoid interference with the new hingepin holders.

Truggy arms would be about the perfect size. A far as more info on the wheels, FG and MCD (most common 1/5 onroad) use a square drive on their vehicles and I'm pretty sure its an 8mm axle shaft. If I'm wrong and its bigger, using a sleeve isn't that big of a deal. So getting the square drive on isn't a problem, and if your buggy/truggy axle is threaded in the center, a bolt with a washer will keep the wheel on there. Oh and FG square drives are alum, with 2 big set screws each, that are 90 degrees apart from each other.