Thanks for all of the suggestions. I have had time now to play with both the RP1000 and GSP 1101 through my LB. The 1000 seems to work perfectly through the serial loop.
The 1101 through the serial loop seems to work ok on whichever module I have plugged in when the amp loop is not engaged and the 1101 preamp is engaged.
When I try to use module one and add delays, reverb, say a screamer, it seems to work well. When I then switch to the module in the second slot, I start getting hissing and mircophonics, then switching to the third slot module, it gets even worse and is unplayable even with a Roctron Hush engaged infront.
I have tried it dry and wet and every range inbetween. I have put the same module with the same settings, low gain, other knobs at 12, and same problem.
What am I doing wrong. The RP 1000 plugged by the 4 cable method works for just effects just fine. How or what can I do to get the 1101 to work properly????
Incidently, I just had a customer service issue with Randall and one of my modules. They responded and corrected the mistake immediately. I sent an email to their general CS address, and within a week they sent me replacement parts no questions asked. That was really awesome!!!!!!