Here is the arraingement for pushrods I use all four of my Kaydets. The fuselage rod are carbon fibre tube (not rod) that is a perfect slip fit for 2-56 Rod ends. Not other special fittings required. Actually I use these on the majority of my airplanes where 2/56 rods ends are used.

I beleve they are only avalible from Darrol Cady a pylon specific supplier and have found at any of the others. Will post a link to Darrols place in a few minutes.
Since you also asked about access hatchs note in the picture of the blue ship there is an access hatch on the side held on with rubber band. In this case it is for access to carry the power supply and batterys for night flight. Another of my Kaydets that I have just finished up that I call the Catalina Cadet I positioned a hatch under the nose for working with multiple fuel tanks.


http://www.darrolcady.com/Carbon_Fiber/carbon_fiber.htm


John