My rk2001 controller is starting to act flakey and I am beginning to not trust it. I think this is a fairly common issue and I have read how guys were able to fix them, but I think I want to go another direction. I really only use the controller for an on/off switch, controlling the circulator, and a count down timer for the fans. I run my boiler flat out to charge storage so I can use some pretty simple mechanical controls. I'm thinking aquastat for controlling the circulator, a timer for turning off fans, and a high limit safety switch to kill the power to the fans in case of an overheat situation. What I don't know is how can I control the fan speed? Would a simple dimmer switch work? I generally slow my fans down after an hour or so into the burn. Thanks for any ideas