Radio Mods & Info I have collected and tried some of them.
Alinco
Yellow wire mod one step further
IC-706 Extended transmit & Extended Receive
DJ-580 Extended Receive & Transmit
Icom
GE Master 2
For Good info on the GE Mastr 2 go to Repeater Builders
Also
Another good guide is available at one of the controller manufacturers site.
NHRCKenwood
TH-75 Exteneded Receive & Transmit
TM-731A Cross Band Repeat inst
TM-731A into crossband simplefied
Radio Shack
Ranger