I need to put some long screws into a wall which is partitioning us and our neighbours (terraced 80's build) to hang kitchen cupboards. I want to use these http://markgrantcables.co.uk/shop/i...ducts_id=126&zenid=569u7ien94p330jiel44rnkfs1 but fear drilling into their house. Am i worrying about nothing? The hole required is 100mm and our wall is platerboard, cavity and breeze block any help would be great, thanks