Yes, we are all faced with the same choice: building light, or building at lightspeed!
At 321 kg (707.7lb), my KR is on the heavy side, so I am now obsessed with shedding some weight. Especially considering that every year into my marriage increases the pilot's weight by a kilo or two! I noticed that my WAFs'lightenigh holes are all 1/2" diameter, so I probably can increase these holes as per specs. Every little helps. I also considered shedding the aluminum fuel tanks. But they are only 1500g each, for 15 liters each, so they are not worth the effort of making new ribs! Serge Vidal KR2 "Kilimanjaro Cloud" Paris, France
