I used to do this and had no problems while using Vandoren classic reeds. But with my EZ refaced Florida Link STM, it doesn't work so well.
First the curve on the facing seems to let the reed bend more. If I leave the reed on the mpc, the reed will develop a curve and it's like playing a closed tip mouthpiece. No other mouthpiece I've used has ever done this to the reeds as quickly. I don't know what the difference in the refaced curve is, but it plays wonderfully as long as I store my reeds in a reed straightening case.
Second, the refaced table tarnishes easily. If I leave the reed on the mpc, I end up with a green mess.
But understand, being forced to properly store my reeds and clean my mpc is a small price to pay for such an awesome blowing piece. And I still leave my mouthpiece permanently mounted on the neck in the "sweet spot". So I can still say I'm a rebel, at least on some level.
