I succeeded at welding two pieces of t post together. Not the best weld, but a weld at that.
I cut one of the pipes to length and went through two blades to do it. I made a trip to the depot to get some blades or an alternate method. I ended up with chop blades for the miter saw and it looks like the way to go. I will try them tomorrow.
I sealed the south side of the shop with tar where I think it has been leaking. We will see.