Tips for removing shark fin cast alum taps

[m2salmon]

Any tips for removing this style of tap? I don’t want to break any off in the tree. The metal is pretty brittle, don’t ask how I know.

[fisheatingbagel]

I've found a small pry bar works pretty good. I ground the end off a bit so there's just a small V left and it goes over the tap enough so the lever contacts the "shark fin"

[maple flats]

I broke one of those off in a tree years ago. I then tapped it with a tap that just fit in the hole in the broken part, then I made a flat piece of bar stock that fit over the broken tap, with a hole just right that a screw fit thru and used it as a puller. It took maybe 3 minutes once I had the tool there, to cut the threads, then remove the broken piece. Once out the tree was no different than all of the ones that the taps had come out normally.