For some strange reason the dip net straight up doesn't work in 3.71 to scoop lake ore - works as a fishing rod, sure, but that's not why I want to use it. I even downloaded 3.63 stable and tested it out there with the mod version appropriate for 3.63 and all works perfectly fine.
I tried a whole bunch of combinations to see if I'm doing something wrong, but it does not matter if my character holds the dip net, if it is on the ground or if I have it in my inventory to select it if the game asks for the dip net - it won't be recognized as a tool when selecting the "scoop for lake ore" option. Also does not matter if I attach a bone or iron hook to it or leave it unhooked (as an aside, it's weird to be able to attach a hook to it), nothing seems to work.