I found a nice condition SLD20 2 speed in my reel cabinet. It was my 50 lb 2 speed back in the days of TLD 20's and 30's. Doing some research it looks like it can only obtain 15 lbs of drag in standard configuration. Is there a way to get more drag out of the reel? I would like to use it as a wahoo trolling reel on long range trips if possible. It has an aluminum frame opposed to the graphite frame on the TLD.