Posted for erosiak@comcast.net:

 hi Mike,
 
 We used aluminum bar stock to mount my front ES seats. This was necessary as
I couldn't fit comfortably per the factory installation.
 
 The aluminum bars are approximately 1x3x30. The seat rails are mounted
farther back on the bars, giving my not so stealth body the ability to get in
place.  The seats bolt to the bars, and the aluminum bars bolt into the
factory specificied installation. Works great. The bolts run through the
aluminum bars and are held in place with a leather covering. The bolt heads
don't turn as we removed only enough material so they would not turn when the
nuts were tightened.
 
 When the front seats are fully extended there isn't adequate room for back
seat passengers, but to be honest I rarely fly with more than two people.
 
 My interior was professionally done and comes out like a puzzle. The front
seats must be removed to remove the two piece side panels.
 
 Hope this helps.
 
 Ed Rosiak
 Super ES