I would think you were fine. I had 2hp HF at one point with 6" spiral, a few branches, no more than 4 elbows (most were 3), a wynn filter and a super...
A slider may be nice. But I think you have a better system as is. The slider will take a lot of room and you still have to handle your sheet. I dont...
The Manhole cover isnt your property so no as far as legality. What you could do is excavate a little on the side and drill through the concrete that...
NJ was always a hard place for stores like these. Woodcraft apparently did the research and the word I got was "it would be more profitable to open a...