Drilling holes in pop up heads is hard enough, drilling two at the right height and angles is darn near impossible for me to do freehand. To help with that unique problem I made a jig, which is now posted to Thingiverse here.
The link explains how it works, but it goes together in 3 parts. The base slips over the pop up. The pin aligns the base to the existing hole, and the collar locks everything in place (with optional zip tie). I used a 7/32" drill to start the hole and ran a 15/64" bit through after that to clean it up. The holes had to be cleaned up a bit with a razor but they look like they will work fine. The pool (not mine) is still filling up so it will be a couple days before I can confirm they work well but the old ones did so these should as well (the old ones had 3 holes too).
The link explains how it works, but it goes together in 3 parts. The base slips over the pop up. The pin aligns the base to the existing hole, and the collar locks everything in place (with optional zip tie). I used a 7/32" drill to start the hole and ran a 15/64" bit through after that to clean it up. The holes had to be cleaned up a bit with a razor but they look like they will work fine. The pool (not mine) is still filling up so it will be a couple days before I can confirm they work well but the old ones did so these should as well (the old ones had 3 holes too).
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