Yeah looks a little lean, throw the plugs in and see how it is (you'll want them if it fixes the miss or not) and if it doesn't sort it out get the new squirters in. 440cc will be plenty big enough.
Really happy with the cas, machine guy did a great job, even machined me a cap out of Teflon. Will cost me an old bumper from the shed and a six pack! I'll upload a whole heaps of pics soon but I'll text you a couple in the meantime.