I did purchase the 250 ex and the wc300 and the cart. Although all connectors are supplied to connect the welder and cooler, the lines are not long enough to reach from the bottom shelf that the cooler sits on to the top shelf that the welder sits on. you will need to extend the lines. I have posted pictures and info on how i accomplished this in my gallery.
When opportunity knocks, most do not recognize it, because it shows up wearing overalls and looking like work!!
Joshua,Tacoma,Wa
24'x48'shop-6/2010
Hobart Handler125w/125cf 75/25-1998-Welds perfect
Power tig250EX-w/300cf argon-2/2011-had 4053 problem, fxed and good as new
Power Cool W300-4/2011-works great after making hoses
Power Plasma 50-4/2011-in for repair
Shop air