Well folks, I see this subject has cropped up again.
Some points I would like to make.
(1) I used matching (10-24) SS acorn nuts with a SS flat washers over the Ensolite on the inside every where. I don't mind the appearance of a nice shiny acorn nut.
(2) I replaced every rivet that penetrated the outer shell. No screws, no rivets through the shell now.
(3) I used soft 3/8"dia. white plastic washers under every SS Truss Head bolt to seal between the head and the shell.
(4) I make thin rubber gaskets to go under every fitting on the outer shell.
(5) I have not had one leak since replacing all the the rivets.
(6) I have not had one nut come loose as yet.
(7) I was able to install almost every bolt and nut by myself simply by reaching through the open door or opening the sliding windows
and screens. There where very few I had to get my wife to help me with.
(8) I got rid of as many fittings inside and outside that where plane metal as they rusted and caused stains in the gel coat and the Ensolite. I replaced with as many as I could with SS or alum.
If I bought another trailer I would do it exactly the same way.
A couple of notes of interest.
used 3/16" alum. rivet which worked ideal for 10-24 bolts as they are 3/16"dia. A friend of mine has an earlier model Boler
and it looks like they used 5/32" rivets so he is replacing his with 8-32 SS Truss Head bolts.
The original acorn nuts Boler
used on the pop rivets where for appearance sake only.
Other than that they served no useful purpose. Also the would rust up and stain the Ensolite.
As far as the strength of pop rivets versus bolts cracking or tearing through the fiberglass I think is a non issue. They will both have the same effect as I have seen on snowmobiles, race cars etc.
Most of what I have done has not proved very expensive, just a little time consuming but the end result has been well worth the effort..
PS Donna, Could this thread not be combined with the other one???