I read much about devices, key holders and denial and thought it would be a good move for me to start self denial and then once comfortable with the CD, hand the keys over to my partner.
I studied the posts about devices and sizing and in the end opted for a Steelworxx Steelheart.
I have a 10mm PA in my dick, so I have a very secure device with the PA fixing in it, even though I do hold the keys myself at the moment.
I got the CD yesterday and took it to work with me, and locked myself in at 14:00, it was a bit of a struggle as I was a little excited, but I waited patiently and eventually I managed to fit the 47mm standard ring, the PA fixing and then the tube. What a thrill to be locked in. I have been locked in for 15 hours so far and counting.
As far a comfort goes, most of the time I don't even know I have the CD on.
I think I will swap to the 45mm anatomical ring this morning (with no funny business while free).
The tube is the right diameter as I would never have been able to get my dick and PA fixing in if it had been any smaller.
As for the length, it perhaps could have been shorter, but that is difficult to know as I can't actually see how full the tube is. I do know that the ball from my PA is right up against the hole in the tube so there can't be that much room in there.
I did have an erection this morning, not painful as I have very low hanging balls so the tube can move away from my body quite a bit (hence me trying the smaller ring today). Importantly though I could do nothing with the erection, there is no way to get the stimulation required to orgasam with my dick totally enclosed in metal, there is just no movement in the tube. I quickly realised that it was pointless to try, left it alone and in seconds it was gone - success !
The next step is to reveal the CD to my partner, that will be interesting.
You see we are a gay couple, BUT we no longer have sex.
So him being my key holder is not about him denying me, it is about me wanting to not have control myself.
Because of the lack of sex I masturbate far too much and worry I might look for sex elsewhere.
So being locked up and denied will actually make me happy, and will probably mean nothing to him.
Which is fine and does exactly what I want

I need focus, control and denial.