Plane Racer- I think the 120 is way overkill, as the O.S.91 is plenty of power. The Y.S.91 is near as powerful as most 120 4 strokes and I have to overprop the Y.S. with a 16x6 prop to tame the power somewhat. If you do use the 120 most definitely modify the stock aileron set up and install 2 x high torque servos, one for each aileron. You will have to cut out aileron servo compartments into underside of lower wing. This is really a suggested mod anyway, as I mentioned mine has stock aileron set up and I see mild flutter using the Y.S.91 if I let to much speed built up...

Rendegade- Good to see another Aussie on the boards. I am originally from Sydney myself : ) Now living in Canada.... I was recently in Perth for the first time, even went out to visit the local R/C flying field. Awesome club vacilities sealed runway, taxiway, club house etc. But I guess the local Perth beaches are what really impressed me wow, you have it made mate!
Re- Avomodelli kits they are indeed Tonka Tough! I have even cart wheeled this Bipe on more than one occasion, when nosing over on landing and still 'No Worries' they are indeed strong models... It is the Duraflex plastic fuz's they have that are very hard to brake... You may just have to mail order Avomodelli kits if living in Australia, at least they are back in production and available

Cheers-