Very nice tower set up. After measuring my new canopy over my lift, I really need the lower profile of the flight clips. I ordered a set from MidOhio. With the discout, they were $395 for the full set. Pretty good deal considering most of the other set ups I looked at were $500 and up for the pair.
The hardware on the WD racks is the quick release with the cotter pin. Are you just interested in the clamps? They are sized to fit the lower horizontal bar of the FCT (where the front of the bimini is attached in the picture above). Once I get the new racks (supposed to be two weeks), I will make sure I can get the old ones off. They haven't been moved in about 2 years. If the e-mail in your profile is good, I'll drop you a line.