Xringer,
I know you've asked me this before, but the last step of the install is to wrap your refrigeration lines with a layer of self-adhesive insulating tape. Of course, I used two layers of tape. The wrapping process starts at the bottom and wraps up to the top so the overlaps will shed water.
I am not eager to break into the wrappings.
Your equipment supplier should have an '800 number' support line, that is not from India, who can tell you what size fittings you will be working with.
I used wrenches that fit, and as you saw, made my own crows foot wrench out of a wrench that fit (15 mm), so I don't know if the nut was actually metric or SAE.
Best Regards,
-AC_Hacker
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