RE: yak 54 seagull help
Had one, yellow and black version, had rcg 20 in it, same power as dle 20 (I own a dle 20 also) I sold it to fund a 26% yak.
The plane flys great and infact mine still does for another pilot with one hundered plus flights, 20 cc is perfect for it. Its not a great plane for 3d due to being a bit heavy but it flys acro great. The CA hinges WILL fail with a gasser, do not use them, upgrade to pinned hinges. There is a hugh thread on this model you should post on it as all the info you need is there.