Locations marked and punched

This shows the holes marked and punched on the masking tape. I installed the front bar centered 11" back from the rear edge of the windshield glass. There are internal mounts for the overhead handles directly underneath, but the bolt holes for the landing pad go immediately in front of and behind it.

The rear bar is centered 34" behind the front bar. The outside edge of the landing pads is about 0.5" from the inside edge of the gutter (measured to the center of the gap between the rubber and metal). There's a large internal cross beam slightly further back that kept me from going to 36"-- both internal beams would interfere with installation of the blind nuts (the nuts have to insert and rotate).

There's also a pair of internal rails that run front-to-back along both sides that can interfere with insertion of the nuts. I'd probably go another 1/4" or more in from the gutter if I had to do it again.