All good advice. First establish , as suggested, the mission.
I used a ground adjustable IVO on my 4 place homebuilt and when it went on amphib I adjusted for the desirable power on take off. I will use an IVO with the Kitfox in hopes it serves me as well.
In nearly 20 years flying the homebuilt I only had one person ever in the back seat... Was usually occupied by my Lab.
The Kitfox has been a satisfying building experience and nearly as complex as my earlier plans built...its much better organized requiring way less design headaches.
Expect to be finished in September... But who knows??
Bud