I've been conversing with some of the Kyosho USA team guys (really helpful and a great resource ..... maybe they should have a UK team ..
)
The front wheels are a new part number W5201 (add W for white as per the previous ones) and the offset is VERY diffrent from the original front wheels. If you use the original wheels the car will be VERY much over maximum width and thus illegal for racing in BRCA events.
The original rear wheels still fit though so there is no problem there.
The new front end geometry is more like the rest of the current crop of off-roaders (XX4 style front outboard) and the new rear end in the LAW35 kit is designed to balance the geometry to the new front end.
What you have here is a NEW CAR .... .only the transmission and chassis remains the same as before. The two major contributors to a cars handling are the weight distribution (chassis components) and suspension geometry. So as an absolute minimum you can consider it to be 50% new.
I am looking forward to my car arriving ...... I have only driven a couple of packs of cells through a ZX5 (had the rear - mid conversion fitted) and felt the car to be much nicer to drive than my BJ4WE, I had a couple of minor gripes about the way the car turned in but those should be resolved by the new suspension.
I'll let you know what I think as soon as I've tested the SP.