youdo have a rare find there. The byron F18 is a grassfiled jet. Godd sturdy and steady flyer on the single OS 91 and Byron fan. I believe you would be asking for more heartache than its worth going to a twin setup. I have the Byron F15 on twins...great impressive airplane but a pain in the butt to get flying and keep flying. The F18 on a single is not overpowered, fast or aerobatic by any standard but it will get you in the air. My advice is to keep it simple, keep it a single and you will be happy.