I am Erik.  lived in Tanzania for last 30 some years.  I like to bikepack especially off road.  Cant get out as much as i like right now.  Mzungu means white man in swahili.  i blog on mzungueriki.blogspot.com  when i remember an have time.

thinking of changing to internal geared hub as i get into rough and brushy trails and have had issues with derailleurs.  not convinced about single gear. 

Hope to learn here.

Nice work.

I have been using frame bags for ten years and wondered why they are not widely used.  In fact I find them so useful i am reluctant to go with full suspension because i would lose space in my frame bag. 
On my touring mountain bike I can carry up to 6 litres in the fram bag with domedary bags.