Although it doesn't save a lot of weight, lighten everything you can. "Build lightness in" as Van's would say.

That's how I got my empty weight down to 990 lbs for its first flight.
 
Done in the newer kits already

My 9 tail kit had the VS spar doubler already "lightened".
 
Caution

Be sure to cut holes ONLY in the thick spar NOT in the thinner material. I made the mistake of cutting through both and thought it would not matter Vans said it MUST be replaced. Simple case of not paying close enough attention. ::eek: