I built mine using an OS 70
Stock hardware, stock build
A mix of servos, no light ones
All-up weight 5lbs 12.2 oz (very accurate scale)
The plane flew very well, no snapping. I didn't fly it much because of weather.
Before I tried it again, I made a few changes.
Saito 91 (1/2 ounce lighter than OS 70) triple beam balance scale.
Fiber-lite gear,
http://www.fiber-lite.com/
some much lighter wheels that I had laying around.
Titanium axles.
http://www.pspmfg.com/Titanium Axles.html
All up weight 5lbs 9.0 oz.
This plane came from a certain mail order firm and it was crushed.
Horizon came through for me and sent another fuselage right out.
Well this one was broken at the tail section, but I opted to fix it rather than wait another week.
Yes I know, Bill Pryor, I probably added another ounce or two..
I only got to put it in the air for about 5 min. today running very rich it was awesome.