It astonishes me how tasks scheduled for shed time expand to fill and exceed normal time. perhaps some dimensional instability bleeding out from the TARDIS? The thing about making something well is that it takes time. Changing the task to involve labor saving devices (power tools and jigs) only gives the illusion of saved time for what it actually does is shift 90% of your effort from doing to preparing.

Thus my whole day is spent preparing, making sure that all my planks are the same width and thickness. This is something I learnt during the TARDIS window construction because you really want all components identical (or near as) so that future machining, jigging & fitting can be performed in single actions.