I am going to skin an existing panel and want to create the symmetrical matching effect down the middle.  As I am using dry carbon fibre how do you cut and align the edges to ensure you can get a perfect match. 

I was thinking of using some very light tack tape to hold the weave whilst I cut the carbon to size (Otherwise it just frays and you end up with loose strands).  Once I have applied the base coat and its got tacky, then lay on the carbon and pull off the tape.

Is there any other way this could be done ?