Anyone know what size gas engine would work well in the Great Planes P6-E HAWK ?

Most threads say a 1.20 4c works well. although the specs say .91 4c. I have several of the older KALT 22CC/ equal to ZENOAH 20CC. Would that be enough power ? I'm not looking to do 3-D just some night light acrobatics and scale frying.

Let's here from the peanut gallery....but most of all, I am interested if you actually have one or know of one and what is in it.

Thanks,
Gary