The Porter has a large interior. I have a 100 oz tank in mine, 3 batteries, ( 3- 4500 mah) There are two versions, The Scale series has doors on both sides and provide complete access to the entire interior. The non scale series has a door on one side and access to the rear section of the interior is somewhat limited, although it's still there.
The gear brackets were made by a member, I don't think he was making any more. I have some thicker windshields being made.