I have a new NitroModels Ryan PT-20 ARF : [link=http://www.nitroplanes.com/rypt644070ni.html]http://www.nitroplanes.com/rypt644070ni.html[/link] . The instructions are vague and note that I should use a 4-cycle .52 engine. Can anyone here give me some advice on my engine options? What 2-strokes could I use or what brand 2-4 strokes are good. I have several airplanes all with OS .46 AX engines. I'm looking to explore other brands/sizes or at least different size engines. I do not do much aerobatics (every now and then I'll do a loop or rolls). I enjoy pattern flying and practicing approaches.

Thanks [8D]