Congratulations Dan,
That's a very nice bunch of bananas. I've never had to prop my SH 3640s. Last year and this year I've not taken off many pups and let the mat have multiple pseudostems. As a result I get three bunches of fruit off one mat per year. I've harvested one bunch of each of my SH3640 mats so far this year.
I suggest that you prune pups so that you maintain two or three bearing, three medium, and four small pseudostems on each mat. Water when its dry but not cold. Organics help, but for smell and good growth always maintain mulch on the organics.
Once again, great looking Bunch!