Thanks for the reply Leo L. When I launched by hand I put a little up trim on the elevator, I suppose this would make the effects I described worst?

On a related but different question, my Cub comes with 4ch 35m radio. I asked the guy at the HS I bought it how much 3 or 4 srvos & a RX would be (replacement parts for my Cub) so I can install them into another aircraft (a GWS ARTF for example) whilst leaving my Cub un scathed?. Would it be OK to fit ANY 35m RX as long as the crystals matched and any suitable servos so I am not limited to replacement spares only if I want to use my TX on a different model?

Can anyone recommend a good 'proprietary' 4Ch RX that would suit my 'RTF' 35 M TX, or is it best to use the stock Cub replacement part (not even sure if that stock RX has 4Ch cabability as only 3 CH are used on my Cub?)

Last question-How does one determine the size/type of servo to use for foam or balsa park flyers from about 370-480 size motor models? Surely the type and size of the R/C equipment supplied with my Cub would be sufficient?