Hi Dave,

I do not know if you went back to a year ago where all the issues of the excelleron 90 were discussed, but make sure you go in and
reinforce the landing gear, or it will pop off the first landing you make. (unless the mfg addressed this already, but be safe and do it)
also the aluminum landing gear is soft, change it out to a larger one to give you more prop clearance.

I am running an OS120AX on mine and it is a perfect set up. vertical for ever, however you will need to change the landing gear to allow for a bigger prop. I am running a 15-12 APC and it is perfect. The OS is so easy to use right out of the box.

Glad you are doing sportsman, the new 07 sequence is nice ( this will be my last year in sportsman and it has been fun).

Wayne