Looking good so far, bud!
a few weeks back I posted some photos of my 'almost complete' Tamiya -1D version of the Corsair. My son just put this one together over thanksgiving weekend (but it stalled out because, ADD and video games...)
here is an idea for you for putty. It's typically called "sprue goo", and it's a home made putty/filler.
take an almost empty Tamiya Xtra thin bottle, cut up the sprues (clear parts spruces work best, as it's the most pure form of styrene), and add it to the bottle of xtra thin. Let it sit for a bit, to melt down, then add a few drops of colored paint (doesn't matter what color, but something that stands out against kit plastic is a good choice), and add more extra thin as neccessary To make it the consistency you want for a filler.
another little tip...Tamiya airbrush cleaner (with the pink cap) is almost exactly the same, chemically, as their xtra thin, and cheaper too!