porting heads question

http://cgi.ebay.com/SE-3L6-Long-Ova...ultDomain_2&hash=item5adf001ea4#ht_986wt_1141

This is for shaping and eastwood has a kit that has the sanding pads for smoothing, there should be enough sanding pads for at least 2 sets of heads, just be careful with that rotary file, will eat through metal fast.