My project 32' had no seats so I sat down today to order the parts. I'm nowhere near a big marine store so I have to use catalogs. I failed.

Here is what I am starting with. I have two mounted 2 3/8" diameter pedestal posts. These are plain tubes. One for the driver is 8 7/8" above the deck. One for the passenger which is 10 1/2" above the deck. The difference of 1 5/8" is exactly the same width as a Garelick slider mechanism. So I get matching seats with mounting plates. I set the driver up Seat + Garelick Slider + Spider + mounted pedestal. I set the passenger up Seat + Spider + mounted pedestal. Now the seats are level.

My problem is the Spider. Garelick's have the right look. They mount on the outside of a plain tube. But the catalogs don't show any Garelick's for 2 3/8" tubes only 2 7/8" and above. Other manufacturers have spiders in 2 3/8" but I can't find drawings to see if they will work for the plain tubes. Springfield says theirs is for a "keyed pedestal". Another clearly shows a rectangular hole for the spider to lock into.

I really do not want to tear off the headliner and unbolt the flange and pedestal. Parts cost is not even a factor. Labor and time is. Does anybody know of a spider for a plain 2 3/8" tube?

If you do have to mess with those bolts under the headliner, be sure to install Rivnuts and you won't have to take down the headliner again. No, I don't have stock in the company, but Jeff does.