A couple of points to be made here.... You CAN get at least a 50 watt inside the same size case as a 20 watt. Maybe my 20 watt is larger case, but at 8 1/4"x15"x17 1/2" my two are the same. I've opened the 50 watt and it has the correct JPT 50 watt source. It is tight inside, but fits. Actually looks like same case from the front with the same cutouts, but a couple of more holes for the mounting brackets. The other thing for anyone contemplating an eBay machine is DO NOT BUY from a seller that sells trinkets. They are just a total reseller and won't help at all. You MAY still have issues with the seller, but most of the time they will help.
Woodworking, Old Tools and Shooting
Ray Fine RF-1390 Laser Ray Fine 20watt Fiber Laser
SFX 50 Watt Fiber Laser
PM2000, Delta BS, Delta sander, Powermatic 50 jointer,
Powermatic 100-12 planer, Rockwell 15-126 radial drill press
Rockwell 46-450 lathe, and 2 Walker Turner RA1100 radial saws
Jet JWS18, bandsaw Carbide Create CNC, RIA 22TCM 1911s and others