Has this been done here already?
I have to admit to being intrigued. I quite like the idea of blasting up more climbs per day (while still putting in effort), to get more descending in. Can't see the extra mass being an issue on the downhills.
Bring on a 20kg 160mm FS burly build, and I'd be surprised if I didn't put down some money for one. (Maybe a Nicolai 16 e-boxx would fit the bill already, though being a bit portly, and expensive?)
So, completely sacrilegious or nice option to have?