I use Alumilite Clear slow set. I do humongous pours and the extra 5 minutes makes a massive difference for me. I used to rush my pours just to beat that 7 minute open time. ...made me a wreck! I thought I would try the slow set and it has made all the difference in the world for me.
There is one quirky thing about it though that you should know; When you're measuring it out on your scale, make sure that the "B" side is measured just a tiny, tiny scōshe heavier, as in 0.05 oz heavier. If you don't you will get a very slight, almost imperceptible misting. Drove me nuts at first. I called Carol over at Alumilite and she gave that fix to me. Works every time now!
...just my ¢.02 worth