help! need info for building small potato harvester links for dowloadable plans??

[bolivian farmer]

anyone out there can help me find plans for a potato harvester?

 

[BHD]

I looked and saw a few small harvesters, mostly china made, the blue one looks simple and the grate is shook by pto, This thread has some info and the last one has two PDF's that have drawings and pictures of the guys shaker, similar to the blue unit,
http://www.mytractorforum.com/showthread.php?t=95561

the first one is a animal drawn unit, depending on the size and volume it may be help full.

 

[BHD]

 

[BHD]

 

[bolivian farmer]

thank you bhd for these links, they are very interesting and somewhat helpful, but detailed drawings and dimentions for actually building one of these units for some reason i cant seem to find. i really like this blue unit as well as the one on mytracor forum along with a nice drawing, but doesnt include any dimentions or other critical details for actually building that unit. Any suggestions? Thanks again for these links. i get to internet about once or twice a month, so will check back next time.