I did the first 10 flights on my 33% Extra 260 with 5625's in the tail, held up just fine. I changed them out for stronger servos but it was just for piece of mind, not because they weren't strong enough. I'm sure they will do your 28% just fine for as long as you own it. My 30% Carden has 5625's on all of its surfaces<( 2 on the rudder) & after 2 years and probably 300 flights, I just ordered new gears for all 6 of 'em. The 5945 & 5925 servos are better no doubt, but there is nothing at all wrong with the 5600 series when it comes to sport flying. Some people give 'em a bad rap, I like 'em.