I tired to buy pads for Lockheed AP calipers. The carbon pads did not work, and the modern non-asbestos ones were pretty hopeless. After I again fitted the older asbestos based pads, all was very good. I also tried using a single chromium plate Suzuki disc, the twin high speed steel Suzuki discs are much better. With the Lockheed Master cylinder intended for the single disc, the twin discs are 0ne-finger operation. For me, it has to be that way. Use thumb and three fingers to operate the throttle and one on the brake.