I recoated my vat today, and for the first time used heat (two 75W bulbs, in a cardboard box).
Temp slowly got up to 140°F, and within 2 hours the PDMS was set, but tacky in two corners.
The problem is, for the first time, I have no waterfall.
I've done this before, curing at room temp for 2 days, and had a slight waterfall. Not like original, but it still worked.
I followed the WIKI directions and used a total of 50dwt's of PDMS. As I type this, I realize I used too much, and forgot to switch my scale to grams. DOH!
But still, given that I barely had a waterfall in the past, should I use a total of 45 grams of PDMS, instead of 50g?
(funny how sometimes the process of asking a question, finds your answer for you)