Hi Kempe, yes mate, that bottom blade is well and truly shot, but the engineer will replace it for you with new screws.
The forward facing front edge will be perfectly square and flat, and he will also grind the top (horizontal) surface to
ensure that it is perfect flat also.
I also agree with grumpy that the reel has probably 2 re-grinds let in it, the tricky part will be the set-up adjustment
once it is all back together. I am not sure of the adjustment procedure on the Diplomat, but just remember the cylinder
reel and the bottom blade don't actually touch....there is a minute clearance between the two, but will cut paper along
its entire length.
