On Thursday, 4 February 2016 11:24:44 UTC, Graham P Davis wrote:

In addition to those, you can post a long message on FB and have it
automatically forwarded to Twitter where, after the start of the
original, there'll be a link back to the full message on FB.

Or you could just use FB instead of Twitter. ;-)

I think for something like this, a serious/technical question, I'd reckon email has the most gravitas (well, 2nd to a letter on headed notepaper!).

Richard