If I'm understanding the discussion correctly, it sounds like the genesis of the home made tools subforum was a desire to more easily find topics dedicated to home made tools.
Assuming this is true, I feel like this is a perfect instance where tags could be used. The forum has the ability to search by tags (if you click on advanced search), and I wonder if we could achieve the findability (yeah, not a real word, but it gets the point across) of having a subforum for those who desired it but still retain the actual topic in the forum where they best fit (ie handtools here in Neander, jigs in the General forum, etc.). Obviously this would depend upon the initial thread poster selecting a tag, but I think this would achieve what everybody wants (hopefully)
EDIT - I just realized that it doesn't have to be the initial poster who adds tags, anybody can add up to 2. So, this kind of negates one of the negatives I mentioned above.