Hi.  When doing polyester hand lay-up in the past and using woven roving, I've always alternated chop-strand-mat with woven-roving in the laminate stack; Gelcoat-csm-wr-csm-wr-csm, for instance, understanding that the csm helps with print through and consolidation between the wr layers, especially if using heavy wr mats.  With vac infusion, it seems that woven/stitched fabrics are used throughout in laminate stacks and I can see why you wouldn't want to use csm with infusion.  So, do I need to be concerned when making a laminate stack for infusion about the 'bond' between layers of wr as I would with the above hand lay-up example? I'm thinking that lighter mats between heavy ones and/or using different weaves might be required or maybe I'm just over thinking a non-existing problem as it is the vacuum process that solves any potential issue? Any thoughts?