My guess is jawn that you might be alone at fermenting soyfoods at this discussion site but if you want to question Ilanit about making Natto, you probably need to contact her somewhere else like at her discussion site:
LittleTreeTalk
The reason I put up the links for those various producers of miso is so you can contact them and ask them about the various technical details of miso production.
I would be surprised if you found anyone here who has produced miso or does so now.
This discussion site is more geared towards diet, healing and learning about macrobiotics.
If you can't find people to talk about homemade miso with, why don't you
start a group and go around looking for other producers of homemade miso to join your group.
I'm sure that there are other homemade miso producers in the world and you could have a blast regularly communicating with them in a group setting!
Thank you, very much.
Bruce Paine