AE rc10gt shocks fit on the optima. I just went downstairs and checked these http://www.ebay.com/itm/Associated-8...item5af76091aa
on my Kyosho shocks. they work fine on the kyosho gold shocks. I don't like them and use the kind with the screw in them, but these will work. If you have the red kyosho shocks.....you need new shocks. The red ones are terrible. I'll give you all of those you want.
I just looked at "kyosho scorpion shocks" on ebay. the ones on there look like the red ones, just not anodized red. I think they were 8mm. There were these for 10mm shocks. kind of pricey, though. http://www.ebay.com/itm/Vintage-Kyos...item4d146d0c8a
I'd get some of the ae preload spacers and try those.