Sounds very similar to my first try at a decoction! I can give ya a couple tips...
I think the best tip you gave me so far was "why bother"...
I only have one pot so I won't try another one without a second pot of boiling water handy.
Also only ended up with 29L of 1.036 wort. Going to boil that down a lot to try to get to 5.5 US gal of 1.051
Efficiency seems to be off about 5% from what I've been getting.
Well, I tried it and I'll do it again but next brew will likely be a straight up infusion.