I do know where the weight was saved. I guestimated the weight pretty close considering I had a pretty good idea of what a standard, simple RV8A weighs.
I should have posted what I did to shave all that weight off. I'll do it now...
Most of the weight was lost in the electrical system. I used a Lithium battery at 4 lbs, a skytech 6.4 lb starter, an B&C SD20 alternator (only), LED lighting everywhere, including strobes (so no strobe pack). A lightweight 2 1/4 Trig transponder, lightweight 2 1/4 radio. Since I used used a light battery, I was able to put it up front and used short cables. My entire electrical system demand is right at 10 amps so the alternator will never be stressed.
I also installed dual PMags which are quite a bit lighter than standard mags.
Just those items saved me about 65-70 lbs.
I deleted the ventilation system and installed rotating vents directly in the fuselage. Expensive at $95 each, but save a lot of weight (in relative terms).
My project came with the "Batwing" wingtips. I shortened the wingtips and squared the back of the tip. That saved 6 pounds.
I didn't paint it and I'm not going to. It's getting polished. That's about another 25 lbs.
It goes on and on like that, but you get the idea.
The plane was weighed with the pants on and ready to go.
Hope this helps someone, Lance