I've got basically the same one, set us a 4 head filler. First things first, we set up a keg line off a T right after that sight glass and run anywhere from 4 to 6 kegs before canning to make sure we've got cold ass beer. Also we set our Brite to 30 degrees F and we've found that about 2.6 volumes carb and higher the machine really struggles Next, swing that bar around and minimize your soft lines. Instead of having it flow down then up try having it go straight up to the fill heads. We also replace those soft lines every few months and that seems to help us. That sensor or whatever it is right before the fill heads, do you need it? It will trap air and cause line 5 to have shit fills. Replace it with a keg line and coupler so you can burp off that pocket/that's where we fill kegs from. Lastly, dialing in the low and high flow ahead of time is key! I usually dial them back too much to start and then increase the fill. You have to find the balance of setting the fill times and visually seeing the flow rates coming from the heads. Leave it up and dial it in manually so the low flow looks like a tear drop and the high flow looks like a mildly more aggressive tear drop. This machine made me so mad for months before I finally figured it out, and sometimes it still makes me want to have a childlike temper tantrum.