I don't have a frame idea that I want to specifically say, but I have some key concepts that you should follow with any frame.
-Simplicity is Key
-Rivets
-Keep it as simple as Possible
-Rivets
-Make sure it is not complicated to fix
-And last but not least, rivets.
No really, about the only thing I can say without repeating what has been said is to Keep It Simple Stupid! (KISS)