I plan to expand my operation next year from 100 taps on gravity to about 250-300 or so on vacuum. The woods I tap is along a pretty steep east west hill. I plan to have a mainline run parallel to the bottom of the hill (about 550') with the collection tank at the south west edge of the woods along the road and then run 4-5 lateral mainlines (about 600') up the hill with the 5/16 laterals coming off of those to pick up the trees. Would it be best to run these mainlines perpendicular to the hill or try to fan them up the hill at an angle so they arent at such a steep pitch? Also what size lines would you recommend? I was thinking inch for the bottom and 3/4 for the ones going up the hill. Any advice would be appreciated. Thanks