Have decided on a Norvel .049 for 1/2 a's to be built.

To save phone time, etc., can anyone help me with the differences of the following:
BIG MIG .O49 C/L
B1G MIG .049 START-UP
AME .049
Do all 3 have integrated tanks? Are all 3 suitable for both "beam" & "radial" mounting on c/l planes?

Thanks alot!

Bob