I'm starting to have the same problems with some of the pop rivets on my traveller track that other Blade owners have had. I read earlier about some of you taping a wrench to a batten and extending it inside of the beam to hold the nut in place while you tighten the flathead machine screw from above. It looks like I only need to replace the 2 rivets in the middle of the track. Would it be foolish from a structural standpoint if I drilled clear thru the bottom of the beam and attached the nut to the outside? It would certainly be easier.