I get mine from BigFishTuff, and I run one 48" most of the time. I'll throw out the 60"s if I really need to slow down. With a single inboard, you're probably going to run two bags all the time for better control - and if you run bags large enough that you can bump the RPM's up by 50 or 100 (and still stay slow enough), you'll have much better control - and a nice boost in oil pressure! Also - have you made any modifications to your rudder? With the single engine Sportcrafts, we've always done the 1-2-3 mod to the rudder. Add and inch to the front, 2 inches to the bottom, and 3 inches to the back or the rudder. It'll handle like a whole different boat! Especially at low speeds in the marina!