First well done on your CBT [smiley=thumbsup.gif]
and so sorry you didn't get Mod 1 under your belt today
When the rear wheel locked up did you lose control? thought so long as you kept bike under control you'd be ok, or was it the speed you did on the emergency stop?
Don't see the point of a set speed, :-/ don't we ride at different speeds when out on the road and whos to say your next avoidance or emergency stop won't be at low or hight speed .

You'll be ok next time you do your Mod 1