The question is, how does everyone install the standard rock system in the trenches? The 4" drain pipe has to be 6" off the bottom of the trench. The old way, was to install batter boards (1x4's on its side) with the top 6" from the bottom of the trench. Then you would secure the drain pipe to the top of the batter board and dump the rock, on top of it, with a 2" cover, over the top of the pipe. Now this was a PITB
Now everyone in my area, uses what we call a sled. It is made of 5-6" PVC pipe, my is about 8ft long. The pulling end of the sled, has a bracket bolted to the PVC pipe, with a piece of flat metal (about 10" x 12") this is the sleding part of the device, it is 6" from the bottom of the plate, to the bottom of the inside of the PVC pipe. You start out, with the dead end of the sled resting on top of a 6" +- stick, This holds that end, at the correct height, you just install the drain pipe (in my case we use the black flexible pipe, with holes on the bottom. Put all the pipe together at the correct total length, put it in the working end of the sled and dump rock on top of the sled, the working end has a rope attached to itand you just pull the sled until its gets about 2ft from coming off the end off the rock, now dump rock on top of that and just keep going to the end.
Im sure I have let stuff out, but I was just curious how everyone installed their regular rock systems