[quote="nudel"] I've never tried having 500 layouts in Opus so I don't know if you'll run into problems but I expect it'll work fine.
Of course, none of this is an ideal solution for what you want. If you/we can come up with a good solution there's always a chance that GPSoft will add whatever's needed to do the job, so long as it's not too esoteric.[/quote]
As I mentioned earlier, I submitted an enhancement request to GPSoftware, that I believe would be an ideal solution 
to this type of business requirement going forward. Obviously, it will not help in the current Opus version.
Again, I invite everyone who has participated in this thread to please read through the enhancement request here:
[url]Sync Pairs (or maybe Sync Queues or Copy Queues)]
I further invite people to add their insight to that request. Opus, after all, should work for the entire user community. I may have already submitted that request, but I do not have any illusions that my idea is as entirely thought out as it could or should be, or that it speaks to what other users will find useful. So please go participate in that thread.
If enough people add their insight and support of a prospective new feature (i.e. we all work together to suggest the most ideal and reasonable solution), it will be more likely that GPSoftware will agree that it is a viable feature worthy of their development time.