been playing with luminocks. they're the greatest thing since sliced bread....hee hee. so far, they only come in flat nock style to fit 2219's. found that with a little tinkering they can be made to fit the gt laser 2's. just have to take a sharp knife or scalpel and trim a bit of the collar. thought you guys might like to know. i know that i'll probably never shoot another arrow without them. great for old tired eyes....hehe.