You must have missed my last entry where I gave you the dimensions and answered your question about the type 1 and type 2 servo's. Look at post # 26
BTW: someone had a partial Trans-go kit in the for sale ads a few days ago for $40 shipped. He put in a couple pieces from it in his 904 and had the spacer and 727 parts left. Don't know if that'd interest you, just thought I'd mention it.