I've mostly made a new engine box forward bulkhead - still have some more work to do.
But I'm planning on making the hole in the middle for the crank, and since I'll almost never have to actually use the hole, I figured I would cover it with a bed bolt hole cover.
If you're not familiar with those, it's a very traditional item, dating back to at least the 1700's. Bed bolts are very long bolts countersunk into bedposts and run into the rails to hold bedsteads together. Because the bolts are countersunk in the bedpost, it leaves a bit round hole. To dress up the bedpost and cover the hole, they would use decorative cast "bed brasses".
For example:
http://www.vandykes.com/product/bolt-hole-cover1
Here are some other styles:
http://www.rockler.com/product.cfm?p...ter=bed%20bolt
http://www.rockler.com/product.cfm?p...ter=bed%20bolt
I'm thinking I probably will use something like this one:
http://www.rockler.com/product.cfm?p...ter=bed%20bolt
The only question is whether they are large enough diameter to cover the hole. I haven't determined how big the hole needs to be, but I'm thinking a 1.5" diameter cover might not quite be enough.
The other option would be to turn a wooden button on the lathe, and leave a spigot on the tail end of the proper diameter to fit into the hole. I could either rely on a snug friction fit or even cut some threads to screw it in.
I'll think of something - just figured y'all might be interested in the notion.