I will not talk about the 171S 172S but there is no diffrence.
will be a few years I ais two years I think. Pay was the era it is always 990 l. Submitted I just had no regrets and I have not seen up Submitted by step to do better. if I had to take another one I would take in the same series.
I had problem to beginners. The color left in freestyle. No problem on this trip home technicians. It changes the screen. Problem on the next screen there was a dead pixel. No problem the technician you changing rapidly. Since there is nothing. Now it costs much less. Personally I recommend it highly.
Bond to 10