I'm in the middle of the upgrade, ups and downs.
Here is my drip setup for drilling the back wall, tank empty, using an IV tube c valve, stuck into a ziplock and duct taped.
I used a rotozip tile bit in an old drill. I found the cutting smooter with a 10# weight hanging from it.
the water ran into a dry cleaning back nested into a second one, into a bucket.
I made one new hole and enlarged the other
New hole:
enlarging existing hole:
The new box on
New sump
More to come