The road from Songino had the worst corrugations of the trip so far. Bone jarring vibrations for mile after mile, after mile. Loosening ever nut, bolt and fastener. Best check your fillings too!
The bike itself rides better when the sand is corrugated. I find if the lines of sand run perpendicular to the direction of travel, the steering doesn’t have time to wander. The vibration is terrible, but better than the vague steering you get when lines of sand run parallel to the way you’re going. When the handlebars wander 20° either side of straight at 50km/h it’s really in nerving. Don’t throttle off or you’re down for sure!
Apparently there’s a 200km road ahead which is all tarmac. I hope that’s not an urban myth!
sophiewhiptank 
Well done Mark your journey gets more interesting by the mile , to drop the bike in the sand was inevitable considering the rough terrain, l think you did pretty good only dropping it once.
Keep safe,
Dad