I'd love to see a set of ffw compatible middleburns, not cause i don't like my try-alls, more because i've always had burns until i went for a ffw setup last year.
Trouble is that it just doesn't add up when the accountants look at the figures involoved. The costs to develop new tooling are prob quite high and there aren't really that many trials riders to buy them.
Personally i think that lots of people using cranks that easily stand up to trials abuse and are still plenty light enough for xc can only help to sustain middleburns excellent reputation.