Hi nonstoprc,

Weight and price were the issues in my joice of an OS 120 AX. Also, like gaRCfield, I lack 4s experience.

When I did my research, I found the OS 120 AX weight to be less than most and depending on muffler, no more than any other suitable motor.
Used RCU to research weights (attached).
I have weighed the OS 120 AX (post #977) which confirms RCU numbers. Has anyone weighed the 1.10 FZ? and what is the power rating?

Must say, I never considered the noise level (db) - I'll always bear that in mind in future - thanks for pointing it out. Thats what I like about RCU - experienced modelers like yourself, Don M and many others povide so much input for newcomers like myself - and then other newcomers like gaRCfield add their experience and enthusiasm - its like a daily crash course - many thanks to all of you.
I gave the tank over CG issue a little thought with the conclusion that 1) with my still low skill level it might not make much difference and 2) I could revert to a Perry pump if need be for a small weight penalty.