I've done it both ways, including now, a Metro 20 and Classic Jr. Tomorrow I have a Pedal Pad AXS III coming that I'm going to move everything on to. More and more, I find going back and forth is a pain, so I'm just going to go in style and have everything there, ready and in a protective hard shell case. I'll post pics soon. Both my Metro 20 & Classic Jr will be in the classifieds soon as well.
If Steve takes your JR, I may be interested in the Metro 20