There's also the library that Al put out that has lots of great info, with "Book 2" particularly having around 300 pages dedicated to the Mustunt IV.

Al's Models
Book 1: https://drive.google.com/file/d/18k9neW9gjtTekWdFx4mNDnhwdEmpM_C5/view?usp=sharing
Book 2: https://drive.google.com/file/d/1b2logRTrqYsRDyIWB200weEmmiaD0hIg/view?usp=sharing
Book 3: https://drive.google.com/file/d/1Btv22cpTWA52GbMJpfXlodDahi6ePjmz/view?usp=sharing

Mustunt Plans
Mustunt I: https://drive.google.com/file/d/1l0cLHc-iign9OG9Myi9nTwNfkkB9laHr/view?usp=sharing
Mustunt II: https://drive.google.com/file/d/1DVtcu5VScoeC08wZ4OfGQcN8AYNao4jh/view?usp=sharing
Mustunt III: https://drive.google.com/file/d/14LJFlPSPL6MQ5LGnaTi62DGLhehWUnIS/view?usp=sharing
Mustunt IV:https://drive.google.com/file/d/1ZYYHH8sHXxMLTs6u78MuYQ3CvCom1tzu/view?usp=sharing

Copy of the original magazine article: https://drive.google.com/file/d/17iLuu2SMGqxwmdIKBNvRKN9eYVBCMLr5/view?usp=sharing

All of the above has been collected from the interwebs over the past several years. I own none of it; all credit to original publisher(s) and of course, to Al!

Steve

I had to look that up. Kadency effect is a vague description of resonant behavior of the crankcase, intake, cylinder, and exhaust all together. The prime example seemingly a pulse jet, ( a tuned pipe with no engine, lol ) Today it's understood as a combination of components and events. Doesn't even exist without a tuned exhaust?

Have you ever been driving in the car and made a turn, then feel the heat/AC blow at you for a moment from a direction different than usual? The air exited the vent headed in a direction and your car turned while it was still moving. It would seem that, at several thousand RPM, inertia of the transfer charge would have little impact overall, but maybe it still shows up.

Thanks Don. Do you use some special stand to fix the fuselage? Besides that I understood that having level to set fuselage horizontally correct + incidence meter will be enough for assembling.

I set the plane on the landing gear with the tail on a small box and shim it with some balsa until its level. I did not have the flaps installed at this point. You can do it with the flaps installed, but it becomes more difficult to get the incidence meter in place and a slight movement of the flaps causes a deflection in incidence.  Once I get the wing glued in place I do the stabilizer the same way.  I also found that both of the ARF SV-11's I put together did not need much adjusting other than a bit of sanding to get the stabilizer level.  As a side note, I usually glue the flaps and elevators on as the final step in the build, because I normally scratch build and paint. This way the hinges don't get gummed up with paint.

Don

I brushed 3 coats of non-tautening butyrate clear (thinned 50%) on the plane and all parts.  I also sanded lightly between each coat with 320 grit paper.  Now the fun starts with applying silk span.

For motor mounts try Vintage Performance Model Airplanes.