SMJ clutch assembly holder
SMJ have produced this convenient clutch holder that allows you to store a complete clutch as it has been taken from the engine. Simulating the end of the crankshaft the holder can be used to mount an entire clutch assembly from a .12 or .21 engine, keeping all the different parts and shims together. With the optional Infinity parts container you can keep your different clutches safely and conveniently stored, ready for when you need them.
Source: SMJ [infinity-rcshop.jp]