I had thought I posed the question earlier but I can't find it again so I'll ask it again. I have a 02 RX that I pulled the impeller out of. The pump is trashed with a couple broken vanes. The impeller has a couple small dings on a couple blades up close to the hub. Can I knock these dings down and file them or are there other dimensions I need to look at to determine if this thing is ok to reuse? Thanks, Karl