Never hit me to then take each batch and up the percentage of oxide incrementally until I get where I want running all percentage test from one batch. You just cut my testing hassles down even further.
I have been doing 400g test batches because my better half wanted a little more to work with as once past the test squares we extrude, she likes to do some small form dipping in order to further evaluate b4 I make a larger batch. But that was also because I was making each of these individually and it took forever for her to get another test batch out of me. Now I can cut it to 200g batches because I can give her more test for the ones she likes out of the base.
My routine to date has been to then make a 5000g batch of the test ones we like and if we still like it when that's running low I will take it up to 20,000g for normal production.
Now that you laid it out it seems so obvious but I am slow to the obvious sometimes, thanks!