This would be a nice feature but I'd like it because at 10% the TX-500 puts out closer to 2W than 1W. When using the PA500 amp (dyi599) I'd like to be able to reduce the power input to 1W or less.
It might be possible in software. Perhaps it's more a question of demand. I'd suggest emailing Lab599 because I'm not sure they look at (or even have access to) this forum.