greenman407 wrote:I wont need to put bulkheads in the upper hull half because... [snip] the robust indexing flange on the lower hull cast in at the factory for precision engagement . In other words it goes together easily and aligns well.
It's great to see your OSCAR build thread moving along again. Of course your experiences may turn out different than mine, but I found that over time the upper half of my OSCAR hull tended to spring outwards
so the (comparable) alignment strip in my hull is not typically in contact with the upper portion of the hull.
In addition to a couple of bulkheads which I needed to support other features, I've installed numerous keeper tabs on the upper portion of the hull which make contact with the inside
lip of the lower indexing flange so that the upper portion of the hull cannot bow either in or out. The combination of tabs and bulkheads (lower and
upper) keeps everything in tight alignment.
You may yet want to consider installing something
in the upper portion of your hull to prevent running into similar issues. YMMV