Flexible Model Regen

Hi,

I am having problems with a reasonably complex flexible model (cable trunking with patterns and variable length - relations running pattern length). I can get the model to a stage where it is stable and use it throughout designs but this causes a 10 min regen of every trunking component (120000+ features of a mediun sized model) upon model opening or regen. Is it possible to prevent this regen or somehow lock out these flex models once they are in place.

Thanks

Dave