Finished running the main power cables. Turned on the master switch, then the avionics master .... and nothing! In checking, discovered that the master solenoid was wired backwards. We corrected that and were able to power on the panel. Yeah! Clecoed the forward fuselage side bars and gussets on along with the cowling flanges. Also bolted on the prop spacer, spinner baseplate, and rear mounting bracket for the spinner.