I PMd boostfed on HT and here was his response:

Boostfed (4:14 PM 2/12/2004): AEBS has nothing but good ish! Never heard a bad thing bout them! I havde Darton sleeves the first gen which are the exact same as the AEBS T sleeves but Darton had to change it since AEBS patented the design.

This is exactly what AEBS told me. So, I wonder if Darton still makes sleeves as good as AEBS now that they can't have identical ones. h: