Good morning Dan,
By looking at the pseudostems I would not have thought those are SH 3640s. The diameter of mine are about three times as large. That is a nice bunch of bananas, that I do not wait for "a few" to ripen before harvesting. At the hint of the first fruit color change I harvest them. The reason why is they are like FHIA 18s in that they begin to break and fall off the bunch as they ripen. It is best to harvest these "mature green."
Best wishes,
