Copy anything there to you heart's content - that's what these communities are all about - sharing. Much of what I have posted reflects skills learned here.
I just finished the timing chain replacement on my wife's 1981 380SLC (a 116 engine, similar t the 117 in the 420/560SEL, albeit in a much tighter work space) and will post it to my web site
tomorrow, so look out for it if you want to do that job in addition to the chain rails.
Next time I do the injectors, I'll illustrate that also.