Cow Milker Type Enlargement Tools

Sometime back I read on the internet on how to make your own enlargement pump based on the cow milker machine idea. Since that time, however, I have not been able to find that website, is there any of you who might know where it is? Take note that the article said NOT to use an actual cow milking machine, as it is too powerful. I thank you.

A Homemade Pump. Yes a Pump, not a cylinder. is quite interesting. If you want to buy, CTC do an electric pump.