I also have been building with magnet's for a few year's now. As PitS1S stated an entire wing get's layed up to perfection before one drop of glue hit's it. I am more pleased with the added quality of build ability than the saved time. As well as the wing, a lot of fuse's are built in two halve's over the board. Never again will I use stick pin's or any other method for that matter.
I also would like to say nice table's to you guy's. Mine is no where near as custom as your's.
I have also converted a couple guy's from my club to magnet's, all I did was let them see it.</p>