@RoryAlsop or @Kevin, there's an answer here,
outdoors.stackexchange.com/a/19837/5547, that looks like it would make a comment. Willeke suggested it and the OP said he would very much appreciate it. It's a new OP who you can already tell is studying the rules! I don't know if either of you are around, but if so, might you take a look at it? Thanks!