Was messing around for a couple minutes with your idea of Mustang shaped outline on Hummel wings. Looks promising, thanks!I just went back and read this thread from the beginning.
A few comments.
Totally off topic, but I think a standoff scale Mitsubishi A5M perhaps with a 3 cylinder radial, would be a nifty project.
Getting down to pt103 weight is a challenge, Period.
The Shetland Pony plane is great! Cartoon vs. Authenticity? Give me cartoon. I really really like it. Inspirational.
Someone already suggested a silhouette scale model approach without the weight of an enclosed fuselage. Tube & gusset, fabric covered. The Ultracruiser long wing is proven, and you can paint the Mustang taper on or better yet, faux paint where you just suggest it's tapered. For example, white tapered paint on leading and trailing edge, and polished in the Mustang wing outline shaped area. That eliminates the actual root leading edge extension for the retractable gear you don't have, but keeps the look. Paint the bombs on the underside, etc. ....
re: medical & licences.
If you've never Failed a Class 3 medical exam, then you can self certify for a Light Sport licence if you have a valid driver's license and just don't brag about your problems. Ethically, & personally, both of us are mortal, doomed, and "might" have a medical condition that might cause us to fail a Class 3. Ethically, if either of us... Any of us, thinks we might be a danger to others, for example a condition that causes unexpected blackouts, then we shouldn't fly, or drive a car, which is far more likely to harm others. Other conditions that might cause us to fail a Class 3, like Heart Disease or Diabetes, require personal, individual, judgment calls.
My OPINION is that if, for example, your condition is controlled, so you are unlikely to pass out, go comatose unexpectedly, then go have fun. You might die of a Heart Attack? Lots of people will. With no warning. So ask yourself, is that a possibility? Or a certainty? ( don't respond with answers! These are semi-rhetorical questions to ask yourself ) My call is to stay within my Real physical limitations. Not feared ones.
I spent a few years on blood thinners, and the prescribing Doctor warned about bruising and bleeding issues. He didn't want me to continue doing full contact martial arts. ( SCA armored historical combat ) That made sense. He also didn't want me to ride a motorcycle, or bicycle. I might fall down! That is excessive caution IMHO, YMMV.
I don't need to know your medical history. Use your own informed judgment. You may be just fine flying Light Sport where your medical history isn't anyone 's business, unless you crash.
keep on dreaming.