Polyplex in Maschine Random Config

With the recent Polyplex update I now use the single units loaded onto pads but have a bit of an issue with random configuration.
I use 8 units but would still like to be able to randomize the entire kit with a single button.
The way I have almost achieved this is by using the remaining 8 unused pads, each routed to one of the units and midi learned to trigger the global random of that unit. This allows me to individually randomize any of the hits separately but to be able to randomize the entire kit (all 8 units) at once, I have set one of the randomizing pads as the master of a link group which all other randomizing pads are slaved to.
This works perfectly except that with only 16 pads, I have to lose the individual random function from one of them.
So 7 pads will individually randomize the 7 units they are midi routed to but the 8th must serve as the global random for all units.
Basically I need a 17th pad to be able to achieve the ideal setup where each of the 8 units has a randomizing pad of it's own and then the 17th pad would trigger them all at once.
Can anyone think of a clever way about this?