If the prop is normally secured with outer hub bolts then as long as those holes are drilled concentrically with the center of the hub it's no big deal. The center bolt or shaft isn't doing anything anyway. OTH, if the center bolt is doing all the retention then it's a no go from my perspective. The hard part for many is locating the exact center to set up their drill jig or prop washer. Then again, most of them, me included, don't check the actual center and only use the pre-drilled hole...what can I say?