Put some on my sons arrows
they seam to work good
he keeps pealing the vanes off with other arrows so it doesn't effect accuracy at all.
Just make sure your container is tall enough so the whole thing fits in when you shrink the tube.
I just put some on my carbon arrows. They work great. Like 4cslabs said have a tall enough glass so the entire thing goes under water at the same time. I used a Mason jar. Another trick is I ran my real hot tap water into the jar until I was ready to pour the boiling water into it. That way you don't lose any heat with a cold jar. Dump the tap water and pour boiling water into it immediately then stick arrow shaft into it. You absolutely don't have to put arrow into boiling water as it is boiling in a pot.
No more fletching for me. They are great!!!!