I have never used a "pin" before. I always use tooth picks. The metal pin is just too smooth for glue to adhere to. I would be afraid that it would come loose some how. If your looking for a clean install on an arf, I guess the metal pin is better than nothing. What ever you do use will work better than if you used nothing at all. The only time I would say to NOT use the metal pin is in the sea plane realm.

Good luck!