I've used both, flex and rigid. But most often I do it all in rigid. I find it faster and easier. I have 2 handed tools a 1 handed tool and this past year I bought a Hot End System with a spare battery. I liked that so much after just 1 day, I ordered a second one. That is the fastest and easiest method I've ever used. Some were on flex drops (I was just using up my flex inventory), most on rigid drops. I also, put up my laterals real tight, then last year I had 2 crews following adding the drops and tapping. On the old lines we just cut off the old CV2 and hot end installed a new and tapped.
Dave Klish, I recently bought a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.