TABLE OF CONTENTS I don't know if there's any interest in this, but if there is I'd be happy to give the details. But briefly, to gain power I enlarged the air tube ID and shimmed the plunger spring. Cost was $0.00, only rub is a drill bit is needed that will reach to the bottom of a 2-3/4" air tube. This is a little longer than some drill bit sets. The shim can be made from a piece of copper tubing, among other things. Lastly, a spring compressor is needed. I used a couple lengths of welding rod and a piece of wood to make one- simple to do. The $15.00 Daisy Model 105 Buck is the cheapest Daisy I know of, but it uses the same power plant as the Red Ryder so that's why I chose it to use as the guinea pig. There are some differences between the new Daisys and the old Daisys that had removable shot tubes, but the basics are the same so this will work on a large number of lever action as well as pump guns like the Model 25. The can below shows what my 1 month old factory stock, new production Red Ryder does. along w/the modded Model 105 (can below says "104", but it's really a 105). Both were shot point-blank, using the same BBs. This was repeated w/the same results.