Emu XL-7 & MP-7 User's Group

Hello,

I want to store sysex messages in my patterns, preferably whole
multi instrument dumps.
What is the theoretical maximum data size allocated for a pattern ?
And in fact how much extra data fits there under average conditions ?
Is anybody successfully storing Yamaha FS1R performance banks
in an Emu command station box ?

Thanks,

    Zsolt