Jess,
Thanks a lot, that is very very helpful!

Is it correct that these are all coarse threaded bolts, so I dont have to worry about the pitch?
I can just get any stainless steel bolt with same head type and same diameter and threaded length?
(just out of curiosity what is the advantage to a hex head in these applications, or is it just economical, or something like that)
About how many mm would you guess that coller with the unspecified length might be?
Why did you buy the extra washers? How do they help?

maybe its me, probably im a little on the slow side when it comes to mechanical aptitude, but why do they say in parenthese (save) in the diagram? Do we reuse them on the same appliction somewhere or is a just a friendly reminder to keep them for if you ever take the rails off?
I will try to put the brackets on backward, like you say, Jess.
Thanks,
David