Sta-loks question

[seawolf]

Hello all,
A rigger came by my boat and was looking at my sta-lok installation from a while back.
He thought that there were to many threads showing on the fittings, and that the fitting may have backed out during adjustment of the turnbuckles, and to watch out for that situation,
I do not believe this is the case, but need to make sure.
The fittings were tightened but not cranked on when I installed them.

My questions are:
1 How many threads usually show after a properly fitted terminal? (this may be a poor way to look at it, and I will not use this information to determine correctness. just curious)

2 Is it possible to tighten the sta-lok terminal while rig is tuned, or is it best to de-tune the rig and then try to cinch up on the terminal?

3 If I am able to cinch up a bit, it may be assumed that the terminal did back out a bit while adjusting the rig? Or other causes possible?

Thanks for the advise in advance.
Fair winds.
Bob