Some time this year, I found a Spacexpander. When I got it, I hooked it up to the 500B since it's a straightforward installation. There was slight reverb then none so I just got around to recapping it. Still nothing... output on the 500 is diminished with it installed in all functions (normal, reverb only or center). And nothing with the BOING test on the tank springs. Basically everything I did didn't change anything. Now I just want it to do something... there a trick to these?