I have super clued 8 Tens pads on the inside of a Generic CB6000.
3 pads on the base and 1 fits just on the outside of the base.
The other 4 are on the tip , of course.
It took a few adjustments to get the combination most effective. Also even flacid it is very difficult to get the head of my cock in the device. I have to lube up and it takes some time.. but once in and nice and snug... it is wonderfulling painful.
At first when increasing the power to the pads it can feel like it stings a bit but as long as the pads are pressed tightly to the skin it passes.
Some of the setting on the unit are MORE than comfortable... but that is the idea of torture. A few of the settings are very pleasureble but not being premitted to have an orgasm makes this a different type of torture.
I have a part time mistress and it is mostly me doing chores for her. She isn't really into CBT or chastity but between the TENS unit and a shock collar she seems to enjoy having things done for her and has very little interaction with the CBT. Of course I would love more but a slave is greatful to serve.
I am trying to past a link of the device but I guess I do not have permission in this forum.