Brewtools 3-way valve Flow Indicator

Owning a B40 Brewtools beer brewer and can't get my head around the way the 3-way valves work. Here is a design you can lay on top of the 3-way valve that indicates the flow direction.

It just lays on top of the valve, it does not click / stick.

The arrows are carved out, and a second file has the arrows as a print you should be able to lay in for color relief. Just use some adhesive and add them in.