Thanks Yes i have made the drippers myself. Worlds easiest task ever! In general my grow is a copy of gaius' https://www.icmag.com/ic/showthread.php?t=46279 if you want to see how its made. It's just 20mm PE hose as mainline with holes punched and then smaller approx 5mm lines going to the drippers. After a couple of years all the lines need replacement because of salt build ups that blocks the drippers. Concentrated ph down(HNO3)62% can dissolve the precipitates, not the reg stuff at 38%, but i think its easier to replace the lines. The drippers can be reused for as long as you want, as long they are cleaned. In general i'm quite happy with these drippers because they are not prone to clogging.
I use a 200L (approx 50 gallons) res placed outside the tents that last for 9-10 days watering 3 times a day at 40-45 sec with a 2000L/hour pump.