Fit Testing

good thread on DIY https://twitter.com/__philipn__/status/1523517311415513090

and on fit in general https://twitter.com/BarryHunt008/status/1578511215864651778

What may be better than Sweet n Low would be Necta Sweet tablets, as it has a lot less inactive filler. Looks like it's made by NSI Group, available from Amazon and others.