XtremIO XMS - Maximum X-Brick Clusters?

Hello,

Just wondering if anyone knows of a limitation on how many X-brick clusters can be connected to from an XMS server?

I understand there's a maximum of 8 X-Bricks in a cluster but I also understand you can connect numerous clusters to the same XMS server, is this the case?

(Also does anyone know if you can fit 8 X-Bricks into a single rack?)

Thanks,

Nick