Silly but serious DIY question

[Rocketfish]

I am assuming this is near impossible to do, but I wanted to ask it anyway, because my 10 year old daughter posed it to me.

I have a future beach kayak, of the run of the mill paddle variety. I was telling her that I really wanted a Hobie because of the mirage drive. Well, she knows I'm an engineer and have done numerous DIY projects, and asked me why I can't just cut a hole in my current yak and install the drive?

I'm sure people have considered this, but does anyone know if it has been done? I haven't really looked at the geometry in a Hobie with Mirage drive kayak and am assuming the mold gets really narrow and thick in the area where you mount it.

Given our ability to plastic weld and cut holes, how feasible would this be in a regular kayak?