Hole size-slate tile hook?

[gazplumber]

Probably a daft question but please can the Pro's give me some advise.
I'm replacing some missing slate tiles with reclaimed slates. I plan to drill holes in battens to accommodate hooks to prevent 'bounce' caused by hammering, loosening surrounding tiles. My question is, should hooks be secured in tight fitting hole in batten with no movement or should hole for hook be larger than diameter of hook thickness (2.7mm) so the hook 'hangs' rather than being fitted rigid, like slate tiles 'hang' on clout nails?
Thanks in advance for any replies.

 

[catlad]

I don't think anybody can work out what you are trying to do! But if you search for halls slate fixings then they are for repairing slate roofs.

 

[jontop]

Stick em with adhesive