I used to carry this product- using 50/50 salt/sugar and assorted oils and butter. Huge seller, but a PITA with packaging. Due to end user sink side storage~ [sideways, upside-down- etc . ]
IMO~ 2 oz would be better and a good price point at this stage of the economy. Plus they're a bit more usable for samples or freebies if you decide to d/c the sprays. Better bang for the buck.
I am a firm proponent of the wonder of wood and CP soap. Call me crazy, it's the way soap was originally made [once they actually used molds] and it works like a charm for me. YMMV.
I sometimes use clear Sam's Club stretch cling wrap. It's strong as all get out. Also that other wrap, I can't remember this moment, it sticks to the top of the mold easily. Too tired right now to think. {OYE} It rocks- plus no clean up, I'm all about EZ.
She hasn't been on in a while, but you can search posts or topics by user and/or key word. I believe. LOL!! Every recipe will turn out different {IMO} d/t various conditions, tools and level of experience. Are you already a CP soaper? Welcome!
Are you doing the original batch size? I'd say add drop by drop and let someone else test a small portion. You can always add, it's harder to subtract FO.