I just bought a Techni Ice. The eski itself looks great and they should hold heat well. However, if you are trying to fit a bulkhead and tap, you may have problems. I am having trouble fitting my Beerbelly bulkhead as getting a proper sized silicone seal on it is difficult due to the position of the drain hole.
I know its well over a year since you made the quoted post. I am wondering which size icebox you purchased from Techni Ice and also wondering how it has been going? I am thinking about a 60lt one for my first mash tun.
cheers
Matt