Here's my latest project. A friend picked up a failed sump for free. 180g, 72 x 24 x 24, all joints were capillary welded and panels were rough cut w/o any edge prep. This is a case for how you should not build a sump. Euro snapped off in 2 places when he tried to lift the tank by it when he got it - snapped clean off, like it was not ever bonded! The reason it was free - vertical seam failed, again snapped clean like never bonded The pressure of the failure cracked the bottom panel, but it doesn't go all the way through the panel (can't feel the crack on the bottom of the bottom panel) other scary looking welds Believe it or not, this thing held water for a time and was actually in use!! The plan is to: 1) drill a hole to stop the crack from progressing 2) re-weld the vertical joint (rough weld) 3) re-attach the euro sections 4) gusset all seams (top, bottom, vertical) with 3/4" triangle rod and square rod in the corners using Weld-On #40 5) patch in missing (cut out) euro sections with 3/8" 6) laminate entire euro with 1/4" strips I spent a few hours cleaning it all up and prepping the bad corner for re-welding. I have the WO40 and 8 pieces of 6 foot 3/4" triangle rod. This should be fun!!