RE: 150% enlarged WingontheWeb HO-229
You do know that the 3/8" robostrut is rated for up to 12lbs airplanes. Should be looking at least the 1/2" strut for the nose and probably the 5/8" for the mains. Make sure you have all that weight as far forward as possible. Keep going on this, dont get burned out.
For the CG the WOW method works fine, but you can also look at the CG sling or Vanessa method. Good luck.