I read a lot about this rigs and i do not have any experience with them but my advice to others is to build their own,i did, i bought the instructions from drill2water and with a little bit of creativity built mine and recently took it down to El salvador and drilled to 50 feet in about 3 hour, could not continue because forgot my rock bit but rig works great better off if somethings fail you know how to fix it.Got my drill stems from deeprock company wich is a very serious company. If you want to give it a shot do it and if i can help email me. If you want get in touch with drill2water.com and talk to Christ and you will see what a costumer service is all about am his customer and all my success is because all his help.Good Luck