Well seeing that none are responding, I will offer my advice.

I wish I had saved the money I spent on my 450's (scale) and put it towards the 500 size. For me, the larger size is so much more stable, to say nothing about much easier to work on....bigger pieces and more room in the fuselage.

Yes they do cost more, but not all that much when you look at the overall cost of ANY scale project. I did one 600 size and THERE I could not justify the cost, but just HADTOHAVE that Mi-24 HIND in my hanger. Go with a CopterX.....quality is "good enough" if not perfect!