Hi Don,
It all depends on what type of pilot you are. Personally i think the Jetcat P-120 is way to powerfull for the Hawk. I would guess the P80 will be perfect.
I know of some flying with a older mercury. Not the HP. You can do a nice big loop afer 6 minutes flying time. There is really a lot of wing and the construction is much lighter than previous Skymaster jets.
So i would go for it if you are just a "scale type pilot". If you like speed and unlimited vertical performace - go for 120!
Best regards
Morne Nortier
www.mnmodels.co.za
Exclusive distributor for Skymaster RC in South Africa