I believe he has been trying them on himself. But it is quite painless, and I'd use it on my cat any day of the week if he'd let me, instead I just put paralixer in his drinking water, and change his litter with a mask.
As for me, I also am using a zapper from zapperplans. I sent my order by mail using their form, and still got it rather quickly, about 2 weeks to the day after I ordered it. Nice folks, and I started seeing worm pieces again the very next day after using it.
I'm planning to do a week of SWF (Salt-Water-Flush) to try to move everybody out. SWF's in the morning and a nice zapping with para herbs at night. See how they like living in salt water for a while. I'll use my probiotics after lunch everyday, like I already do. Then I'll wrap it all up with some major probiotics at night for a while.