Thanks Danny
So for 'light side with the ribs' up does this correspond to having the hook protruding through the flat side of the Xlayer (and vide versa for the other way around)?
Thanks for tip on swivel-clip, I started using swivel clips last week but haven't had a single bite on the Xlayers since - I was afraid that the swivel-clip I am using might be destroying the action of the lure (it is a smallish Mustad angular type clip where the clipping part lies inside the loop rather than protruding outwards). Point taken on using strong swivels, may have to try different types.
OT I'm finding the braid great for feeling all the bumps along the bottom but have yet to catch a bass on it

I did manage to strangely catch a flounder spinning with it though!