Posted this on MTBR.com...

Well, I built my 29" wheel (TN719 with Geax Saguaro tyre) and swopped out the fork (Manitou Minute 29er 100mm travel with 20mm through axle) in place of the Fox Float 140mm).

Cut the steerer down to 225mm (compared with 200mm on the Fox), but used spacers on top so the bars were more or less the same height as before. I didn't flip the stem and all in all, the geometry and riding position was pretty much unchanged (the lower travel and the the extra wheel size cancelling each other out).