I have a bunch of waterproof toolkit boxes that I usually keep in the shed, which are IP67 rated. I'm horribly unorganised and frequently switch tools between them, so I can never quickly work out if the one I'm opening is likely to have the tool I'm looking for. I also frequently forget to put them away, and they sit out in the rain for a day or so. Any kind of sorting and tidying regimen, as I have previously demonstrated to myself, is doomed to fail.
As such, I'd like to fit a small transparent window in the top of each. The boxes are plastic (ABS?) so I could easily take a drill to them and install some acrylic glass, but I'd rather do a decent job of it.
I'm not hugely concerned about retaining the IP67 rating, as something roughly around the IP65 level will do just fine, but I do want to make sure that moisture can't seep in and ruin all my tools.
Any suggestions on how to make a clean rectangular cut in the top of the boxes, and how to seal the "windows" in place without making a total mess and leaking water everywhere?