I like the general shape of this one but it's sloppy and asymmetrical. This is supposed to be an original from the show. A clean version of this is what I'm shooting for. This is making me nuts!
This one is too rounded and has too high of an arch on the front bottom edge.
Bending the plywood is going to be real fun! The compound shape will require glueing and stapling to make the plywood conform! The one saving grace is I have examples of both Ralph Miller and Ed Miarecki chair backs at the Star Trek Tour. I am trying to get an optimum looking chair back by picking what I consider the best most accurate attributes of both designs. The other mistake I see when people make copies is using to much padding making the chair backs look to puffy