Well As you can see the list wil gon and on.

I really don't think the incidence meter will be that of a use on this plane. You can get a way without the CG machine, altough good and usefull you just need your two fingers to balance. And with a hogh wing trainere it is no problem.

You can get a way with the finger prop balancer and which is neat because you can carry it in your field box, the other one you had is nice but will be good to have if you stick with the hobby.

I think you need a expanded scale voltmeter /battery tester, Which is more important than the items listed above. You can't measure it with your fingers

It will tell you whether it is safe to make that last final flight. If you fly 3 flights everytime you go to field, you don't need it now but if you want 4-6 flights you should get.

Well the opinons will vary from now but you pretty much have a good list. I agree all props will do the job and my favorite is APC but MA is a good choice and will be better suited for training.

A $10 toolbox from Wal-mart will serve as a good toolbox.