Cheers guys...
Someone over on the FB Eurorack group suggested the Qu-Bit Pulsar, this might be a thing as i think it will do a 1-shot burst of gates from a single pulse rather like hitting its Burst button.
The X7 idea is great though, for the moment the Pulsar is probably a little way off in my plan for buying modules. I'm mostly thinking smaller and cheaper at the moment.
So could a Divided by 16/32/64 Clock Pulse - Clock a Multiplier to trigger that flurry of Sequencer notes? Or would the Clock already be so slow in tempo that the Multiplier would be too slow?! I need a calculator to work this out!!
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.