> I made a master marked cup with a sharpie, using water for the scales. I
> did it I think tsp by tsp, marking around the cup as I went. The nice
> thing was that I could then simply pick up a paper cup, hold them side by
> side and mark the new cup for use quickly. Never ran into any problems
> with the calibration being so far off that the mix wouldn't kick or cure
> right.

I've done that too, it works great. Especially when mixing extra small batches.

The trouble with the pumps is that you _have_ to mix the same amount every time. Nothing like running around the boat looking for spots to use extra epoxy before it kicks.