I placed another four inch block under the barrel (I think the higher it is, the better) and changed the middle four way connector to a tee, eliminating the middle emitter pipe. Then I graded the bed a little toward the barrel and water flow is much better. I think the 1/8” holes may be too large. I’ll be making another drip irrigator for a smaller bed, and I’ll drill 1/16” holes instead.
Also on this barrel, the mosquito screen top is in place, held on with a band of hanging wire. Since getting that screen to stay in place was a bit of a pain, I placed a 2” PVC fitting with cap near the top of the barrel as a filler. We’re excited and can’t wait to plant.