I think one could easily use a OS 1.20AX or saito 1.25 in the 3DH 62" Osiris.
There is PLENTY of high quality, balsa and Ply in that plane....
Stick a Hyde mount on it, and NO issues at all....

All one would need to do, is spray some clear, on the cowl. It isn't resistant petrolium products....
It is 400$ bones....
I can pick up a COMPARF Intergral white version for 1040$ (need to add shipping)....and have a competition ready 2M pattern ship....

I am interested in the possibility of a 2M Osiris....
3Dh is very good at getting planes finished and ready to go out, within there stated due dates....
I remember another ARF company that said they would have a 2M pattern ready to go last year.....Even had a article in the AMA
Rag....and they said "It will be released by the time you read this article" never happened....

I am guessing 3DHS will have it out when they said they would. April???