I know, its nothing new. But I did mine a little different than the tutorials I've seen.
Kind of look like mine except yours is round and has a hose in it and mine is rectangular and has a manifold.
Honestly it looks like you can make some beer now. It does not matter what you got but how you use it
It looks like a good mash tun to me.
I have a bazooka tube in my ten gallon cooler, but other than that it's pretty much the same.
I have a five gallon cooler that I'm going to convert and it will be pretty much the way you've done yours.
Let's see if I keep this updated!
Black Butte clone
Up next.. Firestone Union Jack clone