Chastity Sub left on Homemade Auto Edging Machine made to cum in his cage

Description: I made an auto edging machine with my magic wand vibrator with a hummer sleeve attachment over the end. my chastity sub was then sat blindfolded on the bondage table with his legs spread apart and his ankles chained to either side of the frame and his wrists were shackled behind him so he couldn’t touch the vibrator which i dangled from the frame above and attached the hummer sleeve over his chastity cage before turning it on. in theory i can leave him there like that for along time with the wand vibrating his chastity cage and there is nothing he can do about it. the plan was for me to leave him there for 2 hours atleast but he lasted about 20 minutes before he blew his load inside the cage.