Thanks Alex. Always giving nice comments.
(But I think that Tamiyas designers can do much better than this.)
Jan: Not a silly question. They fit the 511 as well. Not as nice as the 502X though. As you probably know you only have one center hole on 511.
They actually fit between my 511 lipo trays as well. You canīt use together with long diff cover, but with short diff cover.