You can use a good sharp utility razor knife and make cuts all along the joint of the ski bottom to the sides. Work the blade slowly and deep enough to make a thin cut and you can remove the ski intact. Clean up the glue residue, fix the tube, and reglue the ski bottom and you are done. No sawing or removing of any material is needed. Patience is the key. Took me 5 minutes to do it at a race when one failed on me with too much of an S bend.