Wow Gavin, that is a very thorough job indeed!
Now taking into consideration that most of our builders won't have the same extensive toy collection... Whoops, I mean tool collection that you and I posses there are a few modifications I would suggest.
Once the neck has been adjusted so it is as flat as possible, support the neck on a cut off jeans leg filled with sand.
Eyeball the frets and see which ones are not quite seated properly and give these a whack with a nylon faced hammer to get them seated properly.
Radius block: you can substitute this with a short spit level, some spray adhesive and Norton sand paper.
Of course you will need to be very careful to sand the frets evenly. To do this start in the centre and work out to the edges.
Once you have gotten rid of the blue marker it is time to break out the masking tape and triangle file.
Mask either side of the frets to protect the finger board and carefully re shape the fret crowns.
Then sand as per Gavin's method and steel wool.
If you take your time, you will still end up with an even set of frets.