Mike.
I like T-88 because it's easier to meter out a small amount at a time, than mix a small amount accurately with the other system three products. I like the gap filling property also.

One trick I learned from someone here on the board was to cool the pot of "normal epoxy" with ice to increase pot life. The cold slows down the exothermic reaction. Works great. I've come back to pots after an hour that were still good to go.