There's obviously a trade-off between able to open the case without having to glue it back together - which is kind of needed for good repairability - and having IP67. It don't think it's even possible tbh. If you have screws, you'll have gaps and since IP67 has to be completely dust proof (not only dust protected as IP5) and water proof for 30 minutes in 1m water it's kind of a silly ask for anything repairable.