I too am glad you are on the mend but I sure feel sad about the infection coming on just as you thought you were over the hurts and pains. As far as you question, my reply is, because of the the lack of space around the pattern adding a frame would only end up covering some of the subject. If it were mine, what I would do is make the backer board extend out perhaps an inch all the way around, paint the backer board black and I believe that would make the finished item not seem too large for the wood and give it an added finished appearance. It is a really well cut pattern and definitely is something to be proud of. It is really up to the person cutting the piece as to what they like best, as it is YOUR PROJECT. By the way, there really is nothing at all wrong with how it is as long as it works for you
Dick
heppnerguy