You can get very precise aerobatic performance from a staud, just dont expect it to 3d very well right outta the box. We have a guy at our field who does precision aerobatics with an old trainer, and does them very well.

Flaperons will help you with aerobatics at lower speeds. Percentages will vary on your tastes and abilties. Start off low, and move up in small 5% or so increments. Do it a couple of mistakes high. Turn them off when tumbling and snaprolling (which the staud will do quite well), and turn them on for tighter loops, and great spins.

If your radio has an airbrake switch, employ that too. A tip would be to flip your ailerons up, as spoilerons, instead of flaps on final approach. This will help "plant" the plane downward, and reduce the risk of stalling. Flaps will produce excess lift, and bleed off airspeed too quickly, and it will snapstall out (not a good thing on final approach). I did this with great effectiveness on a pattern plane. You wouldnt want to go much higher than 5-10% at first, and do it up high on simulated approaches. Fine tune that switch to your comfortable sink rate. I have no clue how to set up a flash 5, but someone on here should.

Steve