Thanks, Soapbuddy! I had been using a tiny gram scale like a drug dealer might carry!
Last December, digi scales were everywhere in the Free Shops on the border. Not as much choice now & none measure to 1/10 gram.

I'd got a cool one that goes up to 10 lbs. just for the kitchen...
Now, with your trick, I can put the little one away & use the new one! I'd been trying to be precise on the lye & to the gram up on oils. Your rule is an easy one to remember.
One of the things I like about this forum is all the genuine sharing that goes on... That, and nobody seems to cultivate a snarky attitude, MAJOR turn-off for me.
Lots of soapy wisdom in one place! Thanks again.