Originally Posted by Car Breaker
I also pick one up in local hobby shop (I am in Taiwan）， this is a nicely made kit with few except:
1. the diff which isn't as smooth as other 1/12 I've built include X12, R5.1 and CRC Xi. I highly recommend a slapmaster thrust bearing. it make a night and day different (I built mine with slapmaster and the shop owner who is a reputable racer in Taiwan built his stock. he is amazed with how smooth my diff was）
2. Since the manual mention nothing about optional side spring. I recommend replacing the stock side spring and spring holder with AE parts for more tuning option.
other than that, It is a nice car although not much R&D in it.
I agree with the diff. I switched over to a CRC spur with the 3/32 balls and it seems better. I do not run a thrust bearing but I might give it a try.
For the side springs I picked up some of the windtunnel racing front springs. They are the fronts they use on oval 1/10 pan cars (i think), but they fit the stock Kyosho holder perfect.
Did you have any problem with the front kingpins? When I built the front end as the instructions stated the front end had lots of slop. I had to add an extra 1mm of shims to get it out.