Scaling does not mean just the parts you want but the whole thing!

In your case just ten percent wider on the fuse won't be enough to be concerned as you seem to be.In other words just scale the whole thing and don't worry about the rest.

Now to answer your question, the best way I know of is to use TilePrint (do a search) to do the job. It is easy to use and is under 16 bucks to purchase. Yopu can not beat the price for what this program is able to do!!!

See it here:
http://www.blackflight.com/tileprint/

Robert