mclintock the Akromaster will fly aerobatics reasonably well with any moderately powered .15 provided it is kept under 18ozs wet. Unfortunately the wood SIG supply in Akromaster kits tends to the heavy side, so watch the amount of epoxy used and select an iron-on covering for the wings to assist in keeping it light would be my advice. Similarly with selection of wheels etc. Go with minimum aka light. A couple of ozs either way in a model of this wing area and power can make all the difference between it being a total delight - or a dog.

Don't use bigger than a 2¼oz tank. Not only is greater than that amount of fuel unnecessary, but you don't need any extra wet weight.

The Akromaster is good on 52' lines. .015 are considered the conventional standard for .15³in capacity, but .012 work well enough and offer slightly less drag and inboard weight. 60' foot are too long even in nil wind for either this model or any sport .15 IMO.

If you want to optimise the Akromaster's aerobatic performance, do a an inexpensive and simple mod and flap it. It works well enough without them, but much better with them.

If you're carrying the added weight of a silencer up front, place the engine as far aft as the fuel tank fit will allow.

The Akromaster is really pleasant model for a moderate power .15 when built light, and capable of flying pretty much the whole pattern in a sporty kind of way. I've built and flown several of them over the years. Pretty much brethren of the ubiquitious Flite Streak Jnr or Peacemaker, its the kind of sport .15 one should always have in the C/L hanger. Typically SIG. Flys well.