I’d try what you have until you know what you want. I switched from back mount doubles to side mount.The turret is handy for tucking the hoses, I have a turret on my scubapro regs. I found the 5th port a nuisance so don’t use it. I found I had to keep changing things till I got it to suit me so I first tried what I had and then bought hoses to tidy things up. People will say you have to use din but my regs are yoke so most likely any reg could be used and work fine.