That's very resourceful of you. There are commercial versions made for drying regular boots and gloves, but it's nice to see DIY versions.
The key is not to use heat but just blow air and you'll never damage the neoprene.
The one I have has two plastic corrugated pipes that fit into the boots and run off a 9 volt supply. I no longer see my model on Amazon but it's made by DryGuy.
Adam
Thanks for your comments, but there is a small amount of credit for me. I have just copied the idea.