Advice

I'm still relatively new at high powered rocketry, so I'm unsure of the best way to attach a nose cone to a payload tube/body tube. The two high powered rockets I've built so far, the Sumo and the G-force have their nose cones attached to the shock cords. I recently bought a Mad Cow Aerobee Hi 3.1 rocket and I'm almost done building it. I asked Mad Cow what they recommend and they gave me four ways of attaching it. I wanted to know what you guys thought was the best way? Shear pins? Rivets? Screws? Tie a shock cord to it and attach it some how in the payload section?
I want to modify the nose cone to create a payload section to mount my Jolly Logic altimeter in it, so I plan on inserting a plywood "centering ring" in the opening I will create in the bottom of the shoulder. I was thinking that I could just use four small self tapping screws through the tube and into the plywood ring.
Any suggestions or advice would be greatly appreciated! Thanks guys

I prefer several small wood or sheet metal screws.
Strong and easy to remove when needed.
Some folks like rivets, I don't have experience with them.

Would not recommend shear pins for parts that are supposed to stay attached for the whole flight.
Shear pins are normally used for separation points for second deployment events = main chutes.
Shear pins are often small Nylon screws (like 2-56). They are meant to be cut by an ejection charge fired inside the area they are holding closed.