Montague,

Thanks for the advice. I'm flying the regular Predator. I understand that they've since made design revision to the base model, making mine two or three generations old.

The covering is pretty loose throughout the model. It looks pretty bad, although it flies well. For some reason, I could not get the bargain-brand covering to stick well to the EPP. As it stands, it's loosely draped over the wing

I have not incurred any instance of flutter or control surface buzz despite my best attempts. Perhaps this is simply because I don't have enough power. I'm running an OS 25FP turning a 9x4 prop. It launches well and is good for maneuvering, but quickly overspeeds in a dive.

Have you had to perform any maintenance on the spar or the glue joints? Also, do you have any idea how the Predator performs with a .32 compared with a mellow .25? Is it worth upgrading?