A T-Bird 525 works well with those two particular engines. I have one using an OS MAX .19 with a Mattes head on it that screams. I also have a Greenless Head .23 for B Nos Gas.
Send me your email address and I will send you a list of T-Bird mods gleaned from talking to many experienced T-Bird fliers.
There are 4 pages of MS Paint drawings and a page or so of text. This will get you a T-Bird that will fly right off the board, and will survive contest flying conditions.
Send to: firstname.lastname@example.org 🙂