Re .The blind spot.
I hope this may help. About 5yrs ago a bought a 20-50 which had a blind spot at 17 yds. I made extensive enquiries about getting rid of it with the following results.
You wont get rid of it by re paralaxing.
There was a special cam fitted to those that don't have the blind spot.
I phoned Premier ret did not have any of the cams 5 years ago and would not try to help.
I spoke to Nick Jenkinson who was importing the scopes originally and he didnt have any and couldnt help.
Hope there is an answer out there. Fantastic scope.