Roll on trailer jack

Hey guys I want to build a little roll on trailer jack for my tandem axel, thinking I can just build a little pyramid using stacked 2x6's but wondering if anyone has done this and might be willing to share a pic of what they did and if it works well?

You can purchase a plastic one on Ebay.They are lite and easy to handle also.Camco Trailer-aid Tandem Tire Changing Ramp.

Harbor Freight has some too, cheap.

http://www.basspro.com/shop/en/quick-change-trailer-jack

I see the Camco, can't find anything on Harbor Freight website....thinking I need to put on my flannel shirt tho and get all manly making something...maybe cut with a chainsaw.