I finally purchased a 502X from Japan. The store still a 511, one of each in fact! I purchased their last 502X. It came down to maintenance. The 502 presented less diff rebuilds due to sealed gear boxes. Here in Australia our tracks are all dirt and I'd been there and done that with belts in Yokomo's in the 1990's.
If I had the cash I would have ordered the 511X as well and stored it way. I think they'll become a NIB rarity in the near future or built it for display purposes, as it looks like a nice car to build. I enjoy building new kits just as much as racing them!
The 502X:
http://www.tamiyaclub.com/showroom_m...5790&sid=33946
Any 502X tips Lee for hard packed clay with a dusty surface?
P.S. - Loving the LMR wing on my 502X looks better than the TRF version and is a lot tougher!
