Airhog

Hello, my name is Andy and I am trying to decide on which power hammer that I want to build. I was watching your video on the new style Kinyon hammer and was wondering how you were liking it and if you would change anything since you have been using it for several years now? Also I was looking at the Clontz style tire hammer and wanted to get your opinion on the pros and cons of helve hammer vs tire hammer. Any advice you can offer would be greatly appreciated. Almost forgot, how large of a compressor do you need to power your hammer? Thanks Andy