gentlemen, I am building a tiger 60 to be used for pattern flying and I have a couple of questions:

1. if i go with a 2 stroke Either a .61 or .91 engine) should i use a perry pump or cline regulator? At what point is a regulator and pump absolutely necessary?

2. I want to angle the engine so the exhaust flows out the bottom of the plane ( I have a freestyle I did this with and i like it much better). OR can i mount the engine straight and use a pitts muffler? If I use a pitts muffler? What should I be aware of? I have seen pilots use customer mufflers and have their engines not work right due to insufficient back pressure.

3. If I go with a 4 stoke ( and I am not familiar with them at all)(but love their sound) do they need a perry pump or cline regulator?

4. On a 4 stroke I understand you have to reinforce the fuel tank due to hight pressure? Is this correct or is there a special name brand of tanks for 4 strockers that is heavy duty enought?


and and all help is appreciated.