I can't run pull-pull as I had to mount the servo coming through the top, not enough room inside. I've used hot glue on all my 1/2a combat servos in the last few years and haven't had an issue with them. I know the original 049 size GLH called for double sided tape for the elevator servo due to space issues. It was no problem to hard mount the elevator servo on this one, but the aileron would be funky. I filled the 1st bay on each wing half with balsa block sanded down between the TE and the spar, then cut out for the servo so it's good and solid around the servo with a snug fit. So I'm thinking the hot glue should be fine.