I didn't see the Aurora 45 listed in the post above...They are suppose to fly just like the 60 size airplane (or so I've been told)...
I have an Aurora 45 kit and it has provisions for both rear exhaust and side exhaust engine options...I would personally prefer RE but if a fellow just cant find an engine there is the option for side exhaust...
I'd probably be down for a lazer cut kit of the Citation 45 and Blue Angel 40...
Good Luck with the project...
Chuck