The Wrong Man

Yes, indeed they are strong WM, and so I'm not surprised you're going for lower strength... But surprised you didn't like the RY4 (is it that you don't like RY4 anyway?). At least one person has told me how much they like the RY4 cartomisers...

OK, the 801 atoms I have on Elixir -

These do indeed fit the Stick, but are a tight fit on the sides. I have tried one just now and do not need pliers. But don't forget the "cart cap tightening tool tip" -
If you have difficulty tightening in the atomiser into the Stick, use the white cover that comes with the cartridge to put over the atomiser. It fits very tight, and you can twist it in easier.

But personally I just stick to Janty Kissbox Classic atomisers.