I was able to setup a stock TREX 450 DFC V3 with an APM2.6.  It worked great!

I going to slap that bad boy on a TREX 700 DFC stretched to 800.  The helis are so similar.  I'm curious how the scale will change the PIDs.  Has anyone upgraded their heli this much?  What can I expect to adjust on the PIDs?  It should be a whole lot more stable but just as responsive.  Any comments?

450 Param file

450 Works.param