Another info to share: later S705 batch already include that pink/light purple shock O ring, spring steel front stabilizer bar, and somehow better mould (better injection setting of production) of shock body
InitialD.. please do not forget to post your result with TC body; really interested to know. Also, about your posted setting, when you tried on technical track, how big is the track (straight ?meter, in field ?m). I've been having difficulties of getting a well balance car in 46m straight and 2.8m in fields track (22m wide). Thanks
PS: About that 4.5mm split and pulley configs of yours, tires are all good now after 45mins