That's the beauty of today's modern radio's, it doesn't have to be a "special" F3A radio. There's a heap of model types I'll never use (including umpteen heli swashplate types), why not just just throw in an F3A model type that disables everything that doesn't compy with the rules including the illegal automatic timing functions (that I don't use ).

20 years ago very few CD's would have put up with oversized motors (certain class exemptions probably existed as they do today) even if they were more common and cheaper.

Either rules needs to be updated to refelct the available technology, or radio manufacturers have to be made aware that certain features (if they can't be disabled) might exclude their products from use in pattern competitions. If Futaba put a 3-axis (or even single axis) gyo into every 4+ channel rx in their lineup and it couldn't be disabled, then Futaba would be out of the F3A game, unless you wanted to fly their older products..