SpudFiles

had a quick search but couldn't find any , has any one doe this . Used a blowgun as a hammer valve , for actuation a spring loaded piston .

I have got this to work but i just need to set up the hammer system and it is very sensitive just need a light hammer .

It's been suggested before, can I recommend putting site:www.spudfiles.com at the end of a google search, it sometimes returns things the site engine misses.