RE: mini servos in .40-size plane?
I had a Hitec 225 show me it's full travel range when it was uncommanded, in the air, on a dual servo elevator set-up.[X(]
Have been using 4 JR DS3421 in my 40 size 3D planes since summer of 2002. Best investment I ever made. They are still going strong and I am about to put them in their 3rd plane!
A top flier once said "Buy the best servos you can afford".