I have 6-speed Shimano uniglide FW working flawlessly with Shimano Exage Country RD, and SRAM MRX (Shimano Compatible) grip shifters. The left shifter (3x) is micro-click friction so it adjusts to any triple pretty much. I've had 7spd SRAM MRX shifters working with various older RD6207 (600EX), RD6400(600 Ultegra tri-colour) and old 105 and any shimano/sunrace/sram 7spd HG freewheel/cassette. But if you have an older Suntour FW, you can get 5 out 7 speeds working on the setup and have 7 out 7 usable gears, only 2 are slightly noisy. You need to get the "MRX" grip shifts that are compatible.