MotorGround >> Forward Control Kit - 89 Sportster

I have an 89 Sportster with mid controls. I am looking at putting forward controls on the bike and have found a few options on eBay. I was wondering if the installation is as simple as it seems, just bolt on parts or if I should be prepared to replace the master cylinder, run new brake lines, etc. From what I can tell the kits are just controls and linkages, nothing too complicated but I wanted to see if anyone has installed these before and if there is anything I need to know going into this.Thanks