No pictures today, but I did get some work done... twice. I cut out some pieces of 2" pipe to run under my mini-bog, then I took the angle-grinder with a cutoff wheel and cut a bunch of slots down the length of the pipes. Plenty of capacity for flow - when I tested it on one of the barrel outputs, the water easily ran out, using less than 1/4 of the available slots.
With that done, I dropped the pipes down in the bottom of the basin and got them adjusted in position, then poured in some lava rock I had laying around. I figured that would keep a nice open area around the pipes, then I can pour the pea gravel on top of that. To get some of the extra leaves out of the lava rock, I added water to the basin to float out the leaves. Unfortunately, I also managed to float my newly-buried pipes! After trying to fix the problem, I decided the only way to get the pipes back in their proper place was to remove all the water and lava rock, and do it all over again. This time I did it without adding any water, and the pipes stayed where they belong. I threw some large rocks over the top (just in case), but I should be ready to start adding pea-gravel now.
I also picked up some cement for holding the liner to the barrels. After looking around a bit, I noticed the PL states not to use it submerged under water. I guess it won't technically be submerged, but I got some help and we looked at the alternatives. I found another product for roofing that is neoprene-based, can be used fully submerged, and is rated for 30+ years. And it stays very flexible. Of course it cost twice as much, but I only needed one tube of it to do the job, so we shall see how it works out.
Going to be out of town all day tomorrow, so I'm planning on getting the liner glued to the first barrel on Tuesday morning. Wait a day, glue down the other side. In the meantime, go get that load of pea gravel and get it washed and poured in the basin, so once all the glue has cured, I can fire it up and let the water flow.