Well, I solved my lack of engine issue and placed an order for one. Depending on how they look and line up will determine which one goes on which plane. If the case dimensions for the mounting holes are the same, it wont matter, I can use it on the 4* which is already drilled for the Dubro mount I use with the DLE.  I do need to find a slimline pitts style for the stang though,  The ones I found so far are too fat off the head, and I dont want it sticking out of the cowl.