Colonel---A Morgan Pad will let you drop the pad way below the end of the buttstock. I have a couple on 1100s and they work great.Lock in place and stay there. They run about $30. You do have to grind the outside of the aluminum to fit the end of the stock, but that's not a big deal.---Jack M.
I used Graco adjustable pad plate for my 1100. Model 580 for $50.00. These systems usually add to your LOP. I had Graco cut my stock and fit the Model 580 to it so my overall LOP was 14". Came out beautiful. www.graco-corp.com.