Looking for some info DIY RO build

[cpmaple]

So I was given several items to start a ro build. I'm looking for info which I've looked the last two days through the ro section without any luck an might just be looking over it. Here is what I have on hand
Two 4x40 membrane housings as
Two 4x40 membrane
Brackets to support housing
Feed pump
Procon series 5 190gph

What I have to get.

3/4 hp carbonator motor 48y body for prison pump
All the fittings which I have a list I worked up
Gagues 0-300psi

Now my questions are ?
(1). Flow will be down one membrane an up the other since they will be in series?
(2) what do I need for rotameter flow meters an do they both need to be adjustable also if not what on goes where?

I know the procon should be a 330gph but this was given to me along with the membranes since my biddy had them as extra an spares.

Any an all advice is welcome never thought I would go this route bit here I am.thanks in advance cpmaple

[Dusty Road Maples]

Here is a link to a You Tube video on building a home RO. It is a pretty robust build with more bells and whistles than you may want. Besides the video Sam posted a parts list and some detailed diagrams. I was able to reproduce it exactly and it seems like it will work great. It has the ability to recirculate the concentrate while operating in order to gain a higher brix. This is just the one I built there are many videos on You Tube that will show you more or less complicated systems that you can build.

https://youtu.be/ZUA0kefRDEo?si=0V3GEMC8KQfChzeL

[Hillcrest Maples]

Supplyhouse.com is really good for all your fittings. US Plastic or Zoro for your food grade high pressure tubings. If your going to do anything stainless buy Merit brand not bluefin. Import fittings suck at high pressure. Freshwater Systems for your flow meters. Depending on how you plumb it, you can get a rotometer (5gpm) with one or get a needle valve from Supply house. I would suggest modeling your build after the RO Buckets 2 post, very simple and near bullet proof.