KuroRyu, great to know that my thread helped, and I look forward to seeing your designs!
I'm going to be a little cautious here and say that it may take a number of tries before you get things to your satisfaction.
My first scratch built Tau flyer was the white AX-1-0 next to my Manta that you can see in the first picture the same thread made out of cardboard and sprues.
For me it was more about diving in and getting my hands dirty, and each subsequent build added to my experience on what worked for me and what didn't.
Though of course, there are many experienced modellers and scratchbuilders on this forum who can help cut down some of that learning curve
One piece of advice that may help is that for models on the tabletop, it's usually seen from a top-down view. Especially so for Tau flyers like Tigersharks and Mantas where the flying wing body essentially blocks the view of the underside. So if you need to sacrifice some quality, you can probably make do with some concessions on the bottom side.