OK my comments for what they are worth...
First quote...
Agree you do not use a knot on two snatchies and they have a reason which is logical,
Disagree you never join a static strap or rope but they haven't given a reason so cannot argue their logic, maybe they are worried people may use differing ratings of strap, a knot or shackle, who knows.
One reason I have been given is that Snatchies typically carried by reccy 4X users are 8K or 9K rating and Winch Extensions are often 1/2 that to match winch pull and is also usually what goes pear shaped when you investigate why extension straps bust if used with snatchies IE they used a 8K snatch and a 4.5K extension not an 8 or 9K.
I say, Derrrr, of course the extension will bust first if it is 1/2 the rating so either use an equally rated extension or tree trunk protectors (usually 12K or so). The extension would also break if you used a 4.5K one on an 8K winch.
Tree trunk jobbies are usually only 5 metres but Winch straps are often 20 or so which is often too long unless you are down the beach.
You can double the winch extension but the friction at the equalising point can be an issue
Second quote...
Agree you rig the mired vehicle first, agree you need to be as "in-line" as is practicable
Disagree you never use a second strap.
It is AFAIK an acceptable practice (albeit not desireable) in all facets of industry and recreational use.
It is a module on every accredited Recovery Course I have seen and Vendors and manufacturers of snatchies even have the procedure on their websites, pages, instructions etc so I call total bollocks on that one.
All of the above is why I have a quick chat when doing the demos... what will and won't work is often down to understanding what is happening not just how to connect it
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