I am glad you found my tutorial useful, and the floor is looking really nice. I have done similar thing in my barn project, so have some idea of the quirks of doing those placements.
1) Actually @red51, you can have grid on and use manual reposition items at the same time, and they take multiple move actions(depending on grid size) then they jump from snap point to snap point. I also found when both grid and modular-snapping are enabled this leads to grid overriding exact alignment of the snap.
1b) one quirk with the line dragging of object (and blocks) is that there has to be a solid block/terrain in range of where you are pointing to extend a line. So if you are extending into open space then it will not have an item to track against as it seems to work.
3) also there is a bug that maybe related in that the grid on objects is one resolution higher than the actual grid and the one displayed on blocks.
4) I like the ability to resize the boards, but maybe a couple tiers of sizes could be done, as I know building the roof on my well was painfully expensive, even when spawning materials. The current system is really useful for when you are filling spaces of irregular shape.
7) I am hoping for a stone brick object and boulder/stone object soon will let you do some interesting things with paths and landscaping, plus building details.
Recording Software)
I am not a pro at the whole youtube thing, but I have found that Open Broadcasting Software works really well, better than fraps and the other low end options I tried. Plus it is an free Open Source options versus the better more expensive options. Then I use Lightworks for editing, which has a free options and is way more featured then I probably need.
Backups/Archives)
I still think that this would be a really helpful built-in feature for server admins also. As these mods are not very sexy, so are short lived from my experience.