I think I still have one of those but mine is almost black af all the casteroil burned into the metal, but still good for a 40 size plane..
if you would like to put her on a spad, try it on a McDDD ( almost a spad3d ) , or a QHor and 11x4 prop, and a mouse can pipe, you hover the the plane just fine. I have seen these hover with TT42GP and a 11x4 with a standerd silencer.

A old motor that has run a lot is better than one that has run once and was stored for a long time, you might need the replace all the seals under the card and make sure there is no air leak in/under the card, or just get a new card , much cheaper than a new motor..