I've done it... (not 140, but I still gig my 120 a fair bit). Didn't say I LIKED it!

I don't mind my G70's weight. I feel it twice a gig, as I put it out and back in the case (usually get the case raised up so I don't have to bend to the floor level... even I'm not getting any younger!), the rest of the time, it's on the stand.

But an accordion for an hour or more, especially in the Florida heat... put me down for as light as I can get away with, these days!