True, offcourse besides wanting to fly pattern, we're all addicted to the scent of a new box opening.. i swear the manufacturer put some kind of gas into those boxes, as soon as the shopkeeper opens a box, you're hooked

It's nice to have more than one plane to play with, and if you haven't figured out how to do a certain move, it can be usefull, but other than that, from a pattern-perspective, in my opinion, it's useless to practice with another plane than your competition plane.

I have flown several smaller planes, a year ago my competition plane was a Sebart WindS 110, so I'm not against smaller planes, most of them fly great. I've flown a Protech Tojeiro .50, a Kyosho Oxalys .50, Sebart WindS .110, and also the Sebart Angel .50 (one flight) and WindS .50. They all fly great and all have their own strengts and weaknesses. I'm sure the same goes for the osiris.

However, I feel that flying pattern is also knowing your plane inside out. As stated, every plane has it's strong and weak points. The perfect plane simply does not exist (yet).

By flying your competition plane as much as you can, you learn to cope with it's weaknesses, correcting for those becomes automatic. By changing between planes, you never get this level of feel for a single plane.

It's the same thing for different disciplines in this hobby, like flying jets, helicopters, and so on. All great, but from a pure F3A/pattern point of view, it's contra-productive.