Need some input regarding this vacuum

[RedOctober]

http://www.instructables.com/id/make-a-manual-vacuum-pump-for-under-$20-by-convert/

what do you guys think?

"The net atmospheric force on whatever you evacuate will be over 11 pounds per square inch (or over 1500 pounds per square foot), which is enough for many tasks requiring vacuum."

 

[RedOctober]

This one seems nicer..

http://www.instructables.com/id/convert-a-tire-inflator-type-air-compressor-into-a/?download=pdf