I love my B17.
I've found that the claims of a "break-in period" are overstated in my experience. All of mine have been instantly comfortable and I've never needed a break-in period.
Numbness would indicate some sort of a fit issue, so I would play around with that at first. But I wouldn't recommend "toughing it out" where numbness is concerned. The goal of cycling is to enjoy the sport, not to punish ourselves. Especially as clydes, we owe it to ourselves to enjoy this sport as much as possible, lest we get dispirited and quit.