Bass Boat Dual Graph Mount DIY Heavy Duty Adjustable and Removable

In this video I'm building a Heavy Duty dual graph mount for a bass boat.
Check the links below for the part nr's of the items I'm using.
Order all parts at McMaster Carr
Aluminum Slip-on Framing, 1 5/8" OD Rail , 2 feet long ( you can order any length ) - Item #4699T29
Aluminum Slip-on Fitting, Trough-Hole offset Rail support for 1 5/8" OD Rail - Item #4698T165
Aluminum Slip-on Fitting, Round Flange Rail End for 1 5/8 OD Rail - Item #4698T54
Aluminum Through-Hole Flush Rail Support for 1-5/8" Rail OD - Item #4698T3
316 Stainless Steel Phillips Flat Head Screws 1/4" -20, 1 1/2" long pk of 10 - Item #91500A546
18-8 Stainless Steel Nylon Insert Locknut 1/4"-20 Thread size, pk of 50 - Item#91831A029
Plastic Head Thumb Screws, Large grip 3/8" -16 Thread Size, 1" long pk of 5 - Item#91185A867
18-8 Stainless Steel Ring-Grip Quick-Release Pin with Lanyard, 3/8" Diameter, 2-1/2" Usable Length - Item#94975A247
You can get the other 8-32 stainless screws and nuts from any major hardware store .
Use nylon lock nuts.