Hi Dave.
Why not get a 'water filled' bag, and then you can put more water in or out to adjust weight. They are also easier on the hands and feet. By the way, getting a 'belly band' (big tummy sweat band for weight loss...) and wrapping it around the bag is a great way to protect your body contact surfaces and the bag.
Also, you might consider a speed bag. You can do hands, elbows and kicking on that one also. Of course, I'm biased about that....
train safely
AK author, The Speed Bag Bible
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