Thank you for the review and sorry for the late reply! There's no user list for this but from time to time I see if there are some more engines that make sense as defaults or as examples that come with SSS.

These are good suggestions. Thanks for sharing them with everyone. :) I will think about the user list (actually added that to my to-do list), but it might be a little nightmare-ish to maintain with reasonable quality, so no promises! ;)

Cheers!
Daniel