I have to date built most of the airframe, except the Stbd wing and 3 engine nacelles, have all the servos and most of the electrics. After the above have been built, it is inspection time, then covering in Proskin, covered in metal clad.
Just finished my 1:18.5 Tu-95MS. It's electric, 32lbs, contra-rotating gear boxes turning 12" props, 1P5S 4800mah lipo packs per motor , WS 108" and covered in Flite-Metal aluminum. We hope to fly in August.
Mine was a bear. At your scale yours will be a grizzly