Buy It. BUY It. Buy It.
Here's how to lower it so you can take it home an' fix it!!
1. Get 4 55-gallon STEEL drums, 2 8-10' 4x4's, 24 8x8x8 or 16" cider blocks, several pieces of 2x and 1x 16" pieces of wood. A Buddy/Copilot/Navigator, etc.
2. Stack enough cinder blocks next to the side of each corner, being carefull not to touch the bottom half, so that that the stack is within 8" of the bottom of the top half. Put in enough wooden blocks to get within a couple of inches of the top half.
3. Set the 4 drums upright about 18" from the side of the corners. Use the 4x4's as levers, being carefull to place a 24" piece above the 4x4 to spread the weight over a larger area, to raise the sides. Start raising the lower side first 2-4" at a time, raising one corner at a time. Have your buddy put blocks on top of the cinder blocks as you push down on the 4x4. As you go up, add 2x4's to the top of the drum. Every time you go up 8", replace the wooden blocks with a cinder block. Stop when the 2 sides are level. This should eliminate the "bind" that's keeping it from lowering. You may have to "shake " it get it loose.
4. If the top will raise @ this point on it's own, raise it untill it locks. Remove the cinder blocks, and see if will lower by itself. If it does, your are GOLDEN-lower all the way down, and ROLL. If it won't, reverse the UP procedure, going down on each corner 2-4 inches at a time, untill you reach the top of the drums. Now the tricky part. Turn the drums sideways and place a 2x on each side to ensure it doesn't roll. Continue to use the drum as a fulcrum, going down 2-4 inches at a time untill it's all the way down. Remove the rest of the cinder blocks and you are good to go.