Hey, nice looking build!
I think that's a fitting host for an IR build.
If you wouldn't mind, for my peace of mind, could you meter the raw diode output? Make sure the IR output is what I sold you. Earlier in this thread PED posted with similar findings, and we discovered that the diode was doing the full 1W+, but the lens was giving a 50% efficiency loss. Hard to imagine that the lens could be causing so much loss, and I think we were both surprised when that was the case, but the lens was the major problem.
PED had better success with an IR coated lens he found on eBay.