Oh, is that all?

The speed 900s work really well, it just depends on your design though I think. Beauty just launches something so the centre of gravity won't be changed by holding another robot up in the air like Richie would on those forks - can definitely see it sort of parading machines around the arena atop those! Besides, the speed that the Beauties reach means it'll have something out of the arena in seconds, which is really what you want!

HardWired 1 2 and 3 will all be running 2WD for the foreseeable future, I don't think 4WD would work well on any of those! Besides, it's more weight and if it won't add much there's not too much point. H2 and 3 definitely so, considering they're going to be tiny and there's no space for an extra set of wheels! H1 could do but I'm too lazy to convert it any more than I already have/will be doing haha