RE: Submitted for review: The Mongoose
I'm glad to see that the MeerKat has sparked some interest in simple cheap speed designs. Your model size is around what I have been thinking of building too (that, and also because I've got cores for it already).
I don't think the Jett 40SS has the stones to reach 200, but if you can get it propped right it won't be too far off. A full blown quickie engine might not be able to achieve it either, mostly due to problems finding a prop that works. Both types of engines only turn in the 20 K range, and would require a very over-square prop with poor efficiency.
I would look to a QM engine instead, as they can turn the rpm needed and props are available that work. Another high rpm type of engines would be old Formula One engines.
Anyway, I'm looking forward to seeing your project develop.