Refining something is almost always harder on your own, as it is difficult to look at something with a fresh perspective without stepping away from the project, or being prompted by something to see a new angle.
Speaking of a fresh pair of eyes, mine are hardly fresh at the moment as I have had no more than six hours sleep for the last three nights and I am definitely regretting that. As such I had really better cut this post short, and try for a nice, rejuvenating seven and a half before another day of work.
I'll leave you with one of my very favourite Beatles songs. Goodnight!