There is a ton of information in the Reverse Osmosis section here. Lots of build threads. I went with a 4" membrane from MES for my RO. But lots of guys use XLE 4040 membranes. I think they are very similar.
Take a look at the build threads. There is complete build lists on most of the build threads. Very informative.
600 taps on vacuum
Lapierre mechanical Releaser
CDL electric releaser
2.5 x 10 CDL Venturi ( new for the 2024 season )
Home made modulating auto draw off
Homemade RO 2 x 4" membranes
CDL 16 x 16 bottler
Wesfab 7" filter press
Delaval 73 vacuum pumps
12 hives of bees