i know next to nothing about slaving my (primary) amp. i want to slave my SWR sm-400 (my back-up) to it for various reasons. how should i safely do this? should i even do this? cab-wise i use mesa diesel series 4x10 cab and 1x15 cab, both 8 ohm into the two 4 ohm inputs - not sure if that matters. also, my effects send/return gives me crazy feedback. ive been experimenting with pedals and ambient noise, so these things are pretty important. any info or point in the right direction is greatly appreciated.