Pick up a 12x4 or a 12x5 prop. This is the time to experiment a little, you know what range of props work, and you know the higher pitch prop works, just start experimenting with smaller pitches, one at a time. You will probably go back and forth between a couple of them when you are in the right "zone" for your flying. That Tiger is a super plane, Ihave shot touch n goes for entire tanks of fuel, another thing it was good for, take it up fairly high, and cut the throttle back to idle (works best on a really calm day, but you can do this almost any time) and see how long you can keep it in the air. This will get you really familiar with the slow speed and stall characteristics, which will help a lot judging to approach and landings.