Aj5723

I added some advantages and disadvantages I also added the adjustability of a coil over that people were asking for.

Aj5723, you are invited to the Teahouse!

Hi Aj5723! Thanks for contributing to Wikipedia. Be our guest at the Teahouse! The Teahouse is a friendly space where new editors can ask questions about contributing to Wikipedia and get help from experienced editors like Worm That Turned (talk). Visit the Teahouse We hope to see you there! Delivered by HostBot on behalf of the Teahouse hosts 16:06, 25 April 2018 (UTC)