I measured and still my Jailbird did not fit well the first time. I could not imagine my wife ordering a custom made tube without doing all the measuring first. We do not do contracts as they tend to be too rigid and not adaptable to changing situations. You can revise them but then it gets messy since a change in one part may contradict another section. I just give the keys to my wife and she does what she wants. The only thing I can do is set the outer limit of my orgasm denial. For me it is 4 months.
Our only rule is that my wife makes the rules and can change them at anytime without prior notice. Makes chastity real easy. Why do you need to be cuffed to have a chastity cage put on? You are already unlocked so you could have played with yourself at any time. I sometimes wonder if people really do all the stuff I read in chastity stories. I guess they do if you are doing it. What luck that the Lori tube fits perfectly without a proper measurement. You may find a two year contract more exciting to write than to adhere to for that long. When I am horny I am begging my wife to not let me cum for a year but when not horny I come back to my senses.