Finished it!

I started this puzzle 5 days ago (haven't been working on it all the time, but a total of about 20 hours I think) and finished it just an hour before today's deadline.
It is one of the hardest I've done - there is no picture on the box - but I do have an old O.S map of the area  which did help when it got to the more remote parts. Being the Fens, and therefore all the same level  (i.e. sea level +/- 10m) there are not the usual map features of different colours and contour lines,  many of the pieces were plain white with just a line representing a road, river, footpath, drainage dyke  or boundary. Very challenging but I enjoyed doing it.