Here's the bottom line - Can this power supply provide 8, isolated feeds at 9 volts each? Pretty simple right? Don't want 18v, sag, etc. just 8 clean lines at 9 volts each. Survey says?
Taps 1-4 and 7-8 are rated at 100mA. Taps 5 & 6 are rated at 250mA. These are the ratings for 9V. Yes, a 9V effect up to 250mA can be powered via taps 5 & 6.