Looks great. I have a suggestion, why dont you turn the fixture around and cut the plug off the end of the power cord, Then loop it up into, and through the conduit where you can reconnect it?
I would cut the cord close to the fixture so it could be spliced in the 90 degree access cover by feeding the other end up from the bottom of the conduit. I think it would provide a great way to make the cord disappear and the 90 would provide a safe junction box. Just my 2 cents.