I spent 2 days trying. Pulled it all down went with copper. Couldn't be happier. Every fitting for the max line is expensive etc. Copper is cheap, available any where etc. I have never sweated copper before my airline project and didnt have one leak when I pressurized it.
my .02
I did this:
20180326_203940 by Sean Connell, on Flickr
then this:
20180403_083406 by Sean Connell, on Flickr
has been a VERY efficient building heating and cooling my temp swings are -40F in winter to 100F in summer.
I cheaped out on insulation under my slab. I used the foil backed bubble stuff. r-21 fiberglass in the walls r-60 blow in the ceiling. NW MT I've used about 220 gallons since Nov 1 2019. We've seen temps as low as -30. Shop is about 3k sq feet I keep it at 60.
1/2 pex a loops at 250' bought...
Former professional mechanic here... I have never understood the fascination with using a pickle fork... It ruins the boots. A few wacks with a hammer on the outer part has removed EVERY tie rod I've ever come across probably 10k of them.
This thread derailed insanely quickly. What I'm doing is exactly what the OP needs. Im in NW MT so frost depth is 4' i bury all my water and sewage thats pumped at 6 feet. No real benefit in burying the basin below the frost level. You want easy access in case you need to replace the "cartridge"...
Over those 16 years while you are waiting on your payback you could have taken that $30k invested it with a fund and made probably 6%. Compound it and you are looking at probably $15k return...
Mine is 2" schedule 40. From the grinder pump goes straight down to 6 feet so its below frost line. Then the 300 some odd feet to septic tank. Then straight up 5 feet or so to a side inlet of septic tank. Simple.
OP hasn't answered....
What exactly is out of square?
If its the slab fix it with the walls.
Build everything square and plumb or you'll be kicking yourself in the *** every step of the way.
I have a big shop so take this with a grain of salt.... IMHO a welding table should not move at all. When I'm welding I want everything as rock solid as possible.
One mobile work station and one rock solid welding/fixture table is what works for me.