The short answer is yes. The long answer is no.

The amount of work required to increase draw weight in a bow like your Super Mag is not balanced by the results. And the results would be ugly. By ugly I mean it would look ugly and would not perform well.

Ditto on the Kmag. I am not familiar with that bow, but when you shorten the limbs of any bow, the bow gets stiffer. Again, a lot of work for results that will probably be ugly.

If you want a short high poundage bow, best thing to do is go find one.