I saw some good ideas and some bad ones yesterday. Each of the people I visited had red and blue tubing in the ground running through what looked like drainage pipe. 1 guy had a central boiler and he was explaining how he made his slab 1/4 inch smaller than the boiler so that the rain would drip off the unit and to the ground rather than under the boiler causing rot. The plumbing is what it is. You can do a few things different but it's all basically done the same way. I'm still up in the air about the aqua pex so I'll ask a few questions at the supply house this morning and go for it. Can't wait to get started. Thanks for the pic's. I'll start taking some before and after shots.