Hello, I am working on building a homemade insert boot so that I can run a full liner for my new insert. the Ventinox insert boot is too tall for my application. I have access to a metal fab shop, so building it should be cake, but I have a couple of questions about building this. 1. is 1/8 steel sufficient ? 2. Any recommendations for the type of 6" pipe to weld to the top of it ? I need the size that will connect up with the appliance adaptor for newer stoves. Any Ideas on the size of what is needed ? OD or ID for 6 " I would hate to weld up the wrong size and then have to adapt to that. Thank you in advance.