Of course the original U47 didn't use a remote control for the pattern.
But if you want to put something like Gyraf's G7 or Max's MK7 design in, you need a pattern selection, and it helps to have separate ground connections for the heater and B+, so....
Heater +
Heater -
B+
Ground
Signal hot
Signal cold
Pattern control voltage
Seven pins is good, plus screen / shield. Of course you can double up the grounds, or at a push use the screen as ground. But you have to work a bit harder to keep things quiet, and there is less opportunity to play around with grounding possibilities.
(BTW, I recently go some bits from FLEA and found them a very good company to work with. Their manufacturing quality and customer services were both excellent, and their prices reflect that!)