Congrats on the build
I don't want to be a party pooper
but that's really more of a normal ported sub than a LLT, as the tuning isn't <=15hz, the ports don't have clearance at lest equal to their diameter in all directions, a high pass filter is said to be needed in the design, and there won't be a ~4db/octave rolloff from the lowest room node to tuning.
Should still be a great sub though by all means.