i hear ya, i’ve been in a downsizing mode as well -
did you just need a new bulkhead or did your tank crack?
It is just a bulkhead issue. The problem is that I am not running a sump with corner overflows. I was running two corner HMF sponge filters with an ultima filter. Major design flaw because if those bulkheads leak then my entire tank will drain. If I had traditional overflows I would leak a little bit of water and could easily replace the bulkheads. I need to seal all 4 of my bottom drain holes.