BMatthews/WBlakely,
Just for grins I weighed my 30+ year old Goldberg GL, kit-built, and the All-Up Weight (AUW) was 34 oz. This included the Monokoted airframe, Leisure 05 Pattern Motor on a power pod, 8 x 3 wood prop, 25 Amp brushed ESC, JR 6 Channel FM receiver, Kraft KPS-30 servos, Scorpion Battery Guard, Venom 2S 2000 mAH Lipo and some nose ballast. This combo is a bit on the heavy side but still flies well in light-to-moderate wind conditions. No doubt it would fly better if lighter.
The original GL/Electra airfoil is derived from Goldberg's free flight designs. Note that RA Cores, in Southbridge, MA offers foam cores with spars and sheeting in the modern SD 7037 or S 3021 airfoils. Cost is $35 plus $ 10 shipping. I'm building up a modernized GL with a V-tail and a SD 7037 full-house wing to be named the "Wicked Lady". Hopefully it will fly later this year.
Rgds,
Art ARRO