I clicked 'Yes' at some point in the past 14 months and I followed through, just way, WAY later than one might expect me to. Here's my Sig Kadet:
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Not sure if the plans got updated at any point, this one was built using the plans Matthew PM'd me in December 2021. As you can see, I deviated a bit by not including the dihedral.
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Main reason for this was that a straight wing is much easier to put together in two pieces on an aluminium tube. The second reason is that all the plywood and that heavy duty landing gear I've added will put a fair bit of weight below the wings and provide plenty of stability that way. Also, I've given it flapperons, so the dihedral is no longer a required part of a rudder & elevator config.
Now, what was the plywood I added for? To provide hard points by which I can pin the plane together with three big M8 Nylon bolts that I can turn by hand
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Each wing has a bit of wood with a hole in it. They align over a bit of wood and foam on the fuselage with a nylon nut glued into it.
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The vertical stabiliser goes through a slot on the horizontal stabiliser and pins the horizontal stabiliser to the fuselage. The vertical stab then slots between two wood & foam pieces in the fuselage with nylon nuts and a nylon bolt secures that whole assembly in place.
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And finally, a plywood & foam piece sits angled inside the fuselage to receive a nylon bolt that pins the landing gear to the outside of the fuselage.
It takes about two minutes to completely assemble or disassemble the plane. It's not quite 'flat-packed' like I originally had the idea of doing, but it certainly takes up a lot less space! Here's hoping it flies as well as it packs away.