sure. Anything that works is ok
It worked but I absolutely destroyed the screws in the process. I can't really see a way to avoid stripping them. I'd also recommend for anyone else to simply do everything in one shot (use an electric drill and drill the screws to attach it to the case right away). I figured if I drilled the screws into the fan that I'd create threads (so I can unscrew and put them on my case using a regular 'driver).