:Thank you for replying.  You did it correctly by making the comment at my talk page.  That's helpful because it produces a notice when the user logs in.  However it is also okay to reply in place, so you could reply to this message either here or at my talk page.  There's some benefit replying in place because it keeps the conversation together.  Anyway, to the topic at hand... 

 :The issue of tutorial content in WP with regard to knotting articles is a bit of a balancing act.  There are some guidelines on how to handle the issue on Knots Project page.  Based on my experience, most editors here seem to accept the justification for inclusion of basic how-to-tie information in the article as being part of what one would expect in a well-rounded encyclopedia article on a knot.  While this would seem to contradict WP:NOTMANUAL, it is an illustration of the WP pillar of Ignore all rules. 

 :In the past several years, using these guidlines, the how-to content of knot articles has not gotten out of hand.  Generally articles are fairly stable once basic information is included in them.  The same cannot be said of the EL sections.  The problem is that there are tens or even hundreds of sites with knot how-to information out there now and these are frequently removed on the grounds they do not add significantly to the article, even without possible conflict of interest issues.  Some justification can (and has) been made for external how-to content in articles dealing with complex or difficult to tie knots, such as the Jug sling or Fiador knot.  But if EL rules weren't enforced WP would become a massive link farm.  The amount of traffic WP sees makes it a huge target for people promoting their own thing. 

 :It is also far less problematic if the owner of the website is not the one adding it to articles.  When one decides to add an EL to an article, it is usually with the idea it is the best available external content.  It is difficult to be objective if one is adding one's own website to articles.  I'd say this is also part of the rationale for WP:COI, whether or not there is potential monetary benefit. 

 :You are welcome to solicit additional opinions, but I think it's best for you not to add ELs to your own site.  If the site becomes popular and respected on its own merits, then other editors will link to it as needed.  Dfred