The floating thing is a problem I never envisioned, but it makes sense. My current double boiler is stockpot size, about 12 qts and fairly heavy on the insert. I've never had any issues with it floating. But for the low gauge Carlisle steam pan...hmmm. Your stopgap solution seems pretty good. I will have to get my Anova in and see about other solutions. Immediate idea that comes to mind: two bungie cords clipped across the top. Been making cheese for about a year, working my way slowly thru the Karlin book, in the order that she has them. I made Saint Marcellin, Valencay, and Epoisses today. I am deep into my bloomy and washed rind phase. For temp control I bought a commercial grade induction burner and that has worked really well. I can't imagine doing it on my apartment's crap electric range.