Damon,
Just to back you up, our son Dave is a professional fiberglass guy, and he uses the injection method that you showed in that article on your website. He repaired a soft Laser deck for us, and I watched him drill all those little holes all over it and then use the syringe to pump epoxy into the holes. Worked fine -- when he was done, the deck was solid as a rock. Just looked like it had chicken pox from all those little holes.

Usually people who have an old boat with soft decks are not planning to use it for racing and don't care about adding a little weight. If you can use the injection method to economically restore an old boat and extend its life without grinding fiberglass and shortening your own life, why not?