I do drill a full hole the length of the insert and use a drill bit collar to make sure I don’t drill all the way through the deck. Just put the insert right next to your bit and find the place where your collar needs to be. If i remember correctly, the trampa 15 ply is about 10mm thick. my insert is 6mm long. I drilled in about 7/8mm and it worked beautifully.
Practice on a piece of wood first. I use loctite 648 btw. You can sort of see in this picture the point at which I apply the loctite. see the insert is halfway in.
There is actually 2 inserts on that screw. the top one is being used to push and screw he bottom one in and when the bottom once is flush with the deck, you just unscrew it and violla, insert inserted. Saw this on a @Psychotiller thread so just stole the idea blatantly 
