I notice in pics the Z3 looks as if it has restrictive 1/8 bsp threaded barbs now?. I have one of these that was bought long before they came up with the "Z3" name and it had 1/4 bsp threaded nylon barbs. I replaced these with 1/2 brass barbs, (1/4 Bsp threaded), that I reamed out so the ID was as wide as the channeling, (9.5mm), and smoothed them to the flow. I also had the base milled from 4.6mm to 1mm and it has given much improved flow and 4°C to 5°C lower max temps in my set-up.
Nice to see the Z3 doing well anyhow considering it tends to get overlooked.
