15 minute increment?

It has been a few months since I used chastikey and I see that the 15 minute increment is now gone. I use it for self bondage and not for chastity. There are times that 1 hour isn't enough, but 2 hours is too long. Am I missing something or is the 15 minute increment no longer available?

It has been removed from fixed locks as it seemed odd having. You do have 15 minutes on variable locks though

I don't see why it's odd to have 15 minute increments for a fixed lock. I use it to lock myself inside of a box and the difference between 1 hour and 2 hours is huge. Plus maybe I only have 45 minutes available at times and not an hour. I really wouldn't want to use a variable lock for this type of bondage as my tolerance is limited