I've mentioned Mike Rothacher's expeditions before, particularly in regard to the choke loaded SITs, and have followed most of his single ended stuff along the way. Most of it is variations on Nelson Pass' circuits or offerings.
I was surprised that I'd missed this, having only discovered it recently. For those still interested, I thought this might be of interest as it's totally/easily accessible and has some relevance to distortion identification:
load lines et al
#1 load lines et al
There's nowhere you can be that isn't where you're meant to be