self bondage time game

I'm looking for a game element to influence the length / time in gear and bondage. can decrease, lengthen or even double. 
anyone tips?

I use a timer padlock around my waist to set the minimum time, which is about my latex, and the kitchen safe time box for bondage time and or locks on my cuffs

I'm looking for a game element to influence the length / time in gear and bondage. can decrease, lengthen or even double. 
anyone tips?

I use a timer padlock around my waist to set the minimum time, which is about my latex, and the kitchen safe time box for bondage time and or locks on my cuffs

I have one that is very random but equipment dependant. If you have like a 5 hour ice lock you can add a mystery amount of salt to it which impacts its melting point, might be 2 hours might be 5.