Guys Guys Guys, about the welding thing. I seem to remember Scotty using a welder many times during TOS - I think to gain access to engineering once or an engineering panel.
During the TNG they simply couldn't be bothered going to the workshop to get a welder so they frequently used phasers.
About the construction of the enterprise on the ground. I'm not too hot on this for obvious reasons, but I believe even Galaxy Class vessels were constructed on the ground. Check out this memory alpha page on Utopia Planitia
My first reaction to the picture is that I like what I see, I would like what everyone else on this board would like and that is to see more and soon.