hmm, that's defenitly something i'll be playing around with for the next few days.

Probably would have to switch over to the design mode before constraining the part in the assambly.....

Thanks for the info

ps; my poor atempt was trying to unloading sub-assemblys, but it would load them back up when i reopend the main assambly next time....

Chache option seem a lot better.
thanks again