As to Hanno's Dalotel, I just compared the picture to the original's drawing. I think the model has less dihedral and a symmetric airfoil and maybe even more modifications. The original comes close to the Z-526 in my eyes. With both you have to decide building a scale model (also in behaviour) or a TOC-like flying model (looking roughly like the original). The CAP is nearer to modern planes but may still need some modifications. Actually, I'm not a designer but like to figure out the aerobatic designs. I've compared quite a few of them in different model sizes and at different weights, but not the CAP so far, so I'm all but sure.

My last sentence was wrong. I actually meant increasing the taper ratio or reducing taper for a less tip-stall prone wing planform. I think Hanno followed "bigger flies better" by building his model as big as possible. Not that the snap behavior is better, most important is the lower "relative" wing loading.

You are right, today's models are very lightweight and less airframe weight requires less drive power and weight. Besides, the low wing loading makes for slow flight speed and low drive power. Obviously, Hanno already used the same trick. I think the two .60 engines combined were still not that powerful for the big model, but the gear made a slow-turning big (high efficiency) prop possible and that made for more prop power than a bigger gas engine.

But "bigger flies better" simply means that some movements are scale-like at the same cubic wing loading and most of them even at the same quad wing loading as that of the full-size airplane. That requires a very low absolute wing loading and weight for small models. One reason I admire Ken Bonnema's Brushfire is its "consistency. It's quite big (850 sqin) and has to be built carefully for low weight (lightening holes in the foam cores, film covering, ...). Deadstik achieves 8 lb, giving a wing loading considerably smaller than that of Curare. (BTW, the Curare airfoil could be E169, I should check that.) Still its relative wing loading is quite high (22) so it flies more like a jet aircraft. Fortunately, or consistently, it was designed in the ballistic pattern era when jet aerobatics were imitated (maybe triggered by the Blue Angel) so it even looks like a full-scale jet. Problem with the scale models of full-size aerobats is that they look like an aerobat but fly like a jet. But maybe that's only my problem because I'm a purist.