I have a Red Horse 2004 Mustang Chopper. The shocks on the bike were Progressive 413 non-adjustable shocks. I weigh 230 pounds. The problem became the bike bottoming out. So this is what I have tried. A. I had the original shocks changed to adjustable.. With two on the bike, it would bottom out way to often for me. This is Vermont........the roads are not that smooth. B. I bought some Progressive Airtail shocks. Even with the air bag set to maximum (140 pounds of air) it still bottomed out. It was better then the 413's but I soon ran into air leaks. Off came those shocks. . C I bought a set of Ted Tine shocks they are smaller in diameter then the Progressives so the shocks don't hang below the frame to be caught by the road or steep driveway entrances the problem was I could not adjust the pre-load properly so I lost my travel for my swing arm.. D. I bought a set of shocks from MC Advantage that was s specifically made for two up riding. Worst shocks I ever owned. The dampening fades really fast to the point where the shocks almost start pogoing. So I'm looking again and now I'm asking about your shocks. I like the fact that there's only one airline and that there's no loss of air because the air stays in the body of the shock due to your solenoid set up. Are they smaller in size then the typical softail shock? So if you could reply and give me answers to my questions about your shocks I would appreciate it. Best Regards, Vermont After our customer in Vermont installed the Shotgun Shock he wrote this. I took the bike home Friday and went out for a 97 mile shake down cruise on Saturday. I'll have to shake your hand thru e-mail. The first "normal" ride on this bike since I've owned it. EXCELLENT!