I can confirm that this was the toughest ride I could find on the planet. It took me three weeks to circle Borneo starting from Kuching and back to Kuching via Brunei, Sabah, and the muddy length of Kalimantan from Simanggaris to Pontianak.
That segment was absolutely the toughest sustained physical challenge imaginable.
It was twelve hours a day of spinning in sucking mud, dragging, pushing and gagging for air almost directly on the steaming equator. My hat is off to your team for possessing giant cajones. The question I have for you guys: Would you ever do it again? (I would not)