Hi guys, I have my concrete guys coming this week to work on my spa and I decided to do the plumbing on the spa myself. I am currently remodeling both my pool and spa. I will be canceling out my old spa return jets and raising my spa. I will be installing all new lines from the pump to the raised spa. My plan is to run two 2" return lines and seperate them to into six 2" total spa returns jets. Is this sufficient? Or should I do 2.5" pipe return and downsize to 2" at the spa? I was assuming two 2" lines would give better flow. My plaster guy said I should do 2.5" and downsize to 1.5" at the spa. What do you guys recommend? Also after the 2" spa lines are sticking out of the gunite, do I need to do anything else? Or will the plaster company take care of everything such as the venturri fittings during plastering? Any help would be greatly appreciated!