It took weeks for Magma to finally send me these custom mounts... the tough part is that they are 1 7/8 in diameter, but the rail is 1 5/5. I used some high density foam stuff (think the rolls of non-skid stuff you can buy).
So, I finally got out to the boat to remove the rail and bring it home... Picked up some hardware and went at it...
The Magma Newport is the grill I picked. 9 X 12 cooking surface and no fancy warming racks for me to work around. Just the basics.
http://www.magmaproducts.com/Products/M ... -918l.htmlThe mount is new and is a modified wakeboard tower mount that Magmastarted working with. They look great and will hopefully hold up well!
http://www.magmaproducts.com/Products/M ... ounts.htmlHere is the rough fit of the mounts and the bbq. It has taken 60 days between the mounts and the bbq. This is the second bbq because the first was damaged in shipment. The mounts - Magma makes them 'on demand'. They are not a stocked part.

All the holes lined up
I lined everything up... made some measurements, and got the mounts installed. The foam compressed a heck of alot. The mounts are sturdy, but the forward/backward movement is not resolved.

Here's the 'CougarCruiser custom fabrication'. I've mocked up a post that runs through the middle hole of the swim platform rail and drilled a new hole in the Magma mounting plate. I bought 3.5/4/4.5/and 5 inch 3/8's bolts not knowing which length I would need. Turns out I need a 3 inch. Nice. I washered up the 3.5s as a temp and will swap it all out once I try things as it and am happy with it. The major tough part was the bolt came from the underside and you cannot have much protrusion into the mounting plate - otherwise the drip tray doesn't fit. Thanks lock washer and thin nut. We'll see how this holds.

Got things all screwed down... Not 100% final, but ready for the holiday weekend on the boat!

Since this is meant to be permanently mounted, I also picked up the sunbrella cover

Next stop... back to the boat for a bbq!