I don't mean to be contrarian but... speed hooks can break finer laces, especially if the boot is not laced tightly and there is some friction happening when walking. I can't imagine blaming a shoemaker for the fact that speed hooks can brake a lace. There is a solution that is much more cost effective that sending boots to Budapest for "fixing" : get a few more laces. It doesn't cost much? Vass even includes a second set in the box.