Stabilizer Jacks... I need to make a quick decision

Can someone that's using the BAL Standard T-type stabilizer jacks tell me what the height is of this unit when it's in the stowed or collapsed position?
I see that they need to mount to the underside of a cross member or use a special channel.
I'm looking at putting them on all four corners and I'll need to slide my front and rear crossmember towards the center of the trailer a bit to get coverage on my side wall skirt, so as to miss going beyond my ellipses.
My other option is going with the Atwood drop downs, which will stow tucked up inside on the side of the front and rear crossmember.
I've never used either one, but I like the idea of having an access hole in my skirt for the adjustment wrench on the BAL type so that I don't have to reach up under the trailer to deploy the Atwoods.
Come hell or high water, I want to get my frame cut and welded this weekend and I'll need to know how far I need to move the front and rear crossmembers so that the BAL type hide under the skirt.
http://www.dyersonline.com/pc-1487-246-bal-tent-trailer-stabilizing-jacks-17.aspx
I see that they need to mount to the underside of a cross member or use a special channel.
I'm looking at putting them on all four corners and I'll need to slide my front and rear crossmember towards the center of the trailer a bit to get coverage on my side wall skirt, so as to miss going beyond my ellipses.
My other option is going with the Atwood drop downs, which will stow tucked up inside on the side of the front and rear crossmember.
I've never used either one, but I like the idea of having an access hole in my skirt for the adjustment wrench on the BAL type so that I don't have to reach up under the trailer to deploy the Atwoods.
Come hell or high water, I want to get my frame cut and welded this weekend and I'll need to know how far I need to move the front and rear crossmembers so that the BAL type hide under the skirt.
http://www.dyersonline.com/pc-1487-246-bal-tent-trailer-stabilizing-jacks-17.aspx