Greetings from the UK on a cold, wet and windy afternoon. No photos have appeared this end, if you are having trouble uploading them, try reducing the image size with an image editor, 640 x 480 seems to work OK. I had the same problem with some the other day, they were taken with a really good camera, but the file size was ridiculous. As far as the deck goes, you could either put slivers of wood in the gap and sand flush, or fill it with the filler of your choice, makes no difference as it will be hidden beneath the planking.I gave the deck a few coats of varnish to protect it while I was doing other work, as new woodwork is added do the same, then go over it all at the end of the build. Once the margin planks are laid, start in the centre and work out toward the sides, that way everything remains symmetrical, I did not have the problem of very thin strips at the edges like the bloke on the flikr photos says he had. Draw an accurate centre line down the middle of the deck and you should be OK. I have not built the cabin or fitted out the rear cockpit yet, the hull is being painted at the moment, my mate is doing it for me, he is a painter by trade and does a much better job than I can do, He takes for ever, giving the job about 10 coats but it is worth waiting for. the cabin actually has to be built on to the boat and is not removable, but there is plenty of room inside to work.
Have a nice day,
Nick.