Dinah - you did not say if your horse - Stashu was OK or not.  I hope so.  
On another matter my feet have been falling asleep at rides.  They dont do
this on training rides just at the official ones.  I dont think I was tense at
the last one.  We only did 25 and I was riding the old poky pace setter who is
great about everything a very relaxing mount.  It was for fun only.  and my
feet were killing me.  from the knees down pins and needles.  I would take my
feet out of the stirups and shake them out.  I had not changed anything on my
tack or foot wear.  I dont normaly ride this particular horse this far as he
is my boyfrieds main mount but I do ride him and my feet were asleep within
the first 5 miles.  The stirrup length gave me enough room to post and 2 point
comfortably.  I could go shorter or longer but which would be right?  Val