Hello:

so I set my basic belt as 12 items per second

And a setup to fill the lane

but it back up, and production end up around 660-680 instead of 720

no problem on non overhauled speed (7.5 and others)

I Have two screenshot if needed.

thanks

also no space appearing on F4 toggle

sorry didn't see that you knew on the forum, don't mind me being stupid

edit: apparently it's following my request 15 april (nevermind another user did the same day :d)

Speculation states it's based on a 1/8th of a pixel (at default zoom, that's actually 1/256th of a tile, which makes more sense as a margin as that's an important computer number) steps. so any speed with a multiple of 1.875 should work. 3.75, 7.5, 15 etc should work. So you're probably better off just not turning the overhaul on.
I've changed the default to 15 in the latest update, but there's not much else I can do about it.