In addition to what Lowpost said;

Remember that what makes a driver illegal is some fairly complex technology - creating a trampoline effcet by selective thinning of the titanium face. The production costs of this on cheaper drivers make it less of a worry - I have the same issue with my cheap Slazenger Blockbuster. Trampoline face? Might as well tie a brick to a garden cane

PS - apols for the absence all, and it's good to be back