he said it'd be $250 to put 2, 1" 3/4" holes for the overflow and put the bulkheads in, and he said 2 return holes, he said I need one on each side, and install the bulkheads for those, he'd put a 5' overflow box acrossed the back. the $140 quote was no return holes at all and one overflow box. thought it seemed a bit steep, but wasn't sure I dont feel real confident about drilling myself, the quote came from Waters Of The World in Evansville Indiana, has anyone ever dealt with them? Thanks in advance