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Mike -
We have three sets of 4 bolts/nuts to work with. The first set holds the prepreg cover (split in half so that each seat has half of the cover for the front seat well) on the two bulkheads. The two aft bolts are floxed in place in counterbored holes in the aluminum and go through the hard points we installed in the flanges of the bulkheads. The two forward ones are 1/4" flat head countersunk screws and they also go through the phenolic hardpoints like the standard seat arrangement does. They are countersunk into aluminum extenders. We can get at the nuts easily to take the whole assembly out because they are under the flanges of the two bulkheads.
The second set of bolts is the set that holds the rails to the extenders and thus to the prepreg. Since we had Jim Griffin do our seats, the rails were modified to his specs and I believe the bolts were tack-welded to the bottom of the u-shaped channel. These nuts are not accessible unless you take the platform off because they terminate between the two bulkheads.
The third set is the set that are welded to the tabs on the seat frames themselves. Since they are welded, the nuts are easy to turn because you can get a small socket on them. It ain't easy because of the close quarters and the fact that you have to move the seat forward to get the aft nuts and aft to get the fwd nuts.
One thing that bothers me is that the bolts holding the seats to the rails are only AN3's; yet the remainder of the bolts are AN4's. I'd much like to see that changed to have 0.25" bolts all the way around.
I hope this helps. Although you can get just the seat off of the rails, it is harder to do. By taking the whole seat and well-cover off it is faster and easier.
Cheers,
John
Can you remove the seat with the seat platform still installed? Yours looks similar to mine except I > used phenolic.
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