Have you tried a trike with larger front wheels? I've ridden both 3x24" and 3x26" wheels. Compared to a 20" front/something rear, they feel TERRIBLE. They feel tippy, awkward, and clumsy compared to trikes having smaller front wheels. The only time it makes sense is on something like the ICE Full Fat where the whole intent of the trike is something entirely different and then it feels suited for that use.