The phrase "meant to be a grounding design" wasn't related to John's plans, but mine. The lamination on my boat carries forward to the tiller, cabin sole, and companionway. A 2x4 with carpet scraps, while functional, wouldn't make for a very nice grounding design.
Many PocketShips have been launched with various types of boom gallows - some as 2x4's, some more fancy, some in between, and some with none at all. The point I was trying to make is that it's up to you. However, there are practical and aesthetic reasons to keep it that may outweigh the windage and the weight. Chris writes that it's helped him hold onto the boom when the boom is lashed when motoring. Bflat writes that it can serve as a base for a boom tent and a stern light. I write that it looks nice. John felt good about adding it.
Here's a set of photos from a recent launch in Australia. You probably saw this in an earlier thread.The boat looks great with or without; I like that not having it means some lines can run more aft.
viewtopic.php?f=3&t=506A removable one looks to be a good solution if you're keen on going without one. Where are you in the build?