My 2 cents.... if you're going to move it... put it right in front of the wheel pedestal, rather than in the companionway.... Since you'll be sitting on either side and just behind the wheel that would make it very easy to tend the sheet and the traveler from the helm. With a tiller, you would be sitting more forward (on my boat anyway) than you would with a wheel and pedestal. In which case, running it across the bridge deck would be quite convenient. The nature of wheel steering is that the helmsman often locates themselves farther back....
You might take a look at improving the primary winch location also.... if you can't tend or adjust the jib sheets from the helm you'd want to move them closer...
This might seem obvious, but I would consider mocking up a track and try it in various locations before you start drilling holes.
In any event, I think you're making an excellent adaptation for singlehanding. Too many people are unwilling to move things around. In your case, the mid boom, cabin top set up made the cockpit look larger..... and give you plenty of room for crew to work the boat....but entirely unsuitable for a restricted crew or single handing.
