I am getting ready to release Whirlwind lift ramps. All I'm missing is the flap. I have two sample ramps and they are different. The problem is with the 2 guide brackets. One has one of the brackets above the ramp and another has them both under the ramp. I believe the second configuration is correct but I'm not positive. To make matters worse one ramp has one flat and one offset bracket. The other has 2 offset brackets. I would appreciate if 6 of you would let me know how yours is setup. A picture would be OK too. TIA for helping me get this right.