I think the great lump of an Enya 15 would be both too much weight & power for the little Princess.
36" span with a thin section, like Steve, I'd be looking to put in a .09 or .10.
Beautiful plane, and on my to build list.
For me an English .09 diesel would give it the right appeal. I bought an Elfin 09, but I discovered it's way too beautiful to bury in a cowl.
Regards
Greg