[Shop-talk] air over hydraulic bottle jacks

[Mark Andy]

Howdy,

Anyone here used an air over hydraulic bottle jack like:

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=95553

?

I'm thinking about getting one for use with my hydraulic press, to 
eliminate the "pump a bunch" deal.  When you use one, do you just press a 
button and the ram extends?  Can the speed be controlled?  Does it work 
some other way?

Thanks!

Mark