Drilled and rivetted the gear towers to the forward floor by the aft corner angles, leaving the forward corner angles un-rivetted at this time as per the instructions. Fitted, drilled and deburred the mid-cabin braces, forward and aft cross braces and the throttle quadrant bracket. All these parts are now ready for primer and I'm hoping to be able to do that tomorrow, assuming I don't go skydiving (and given the way the weather has been over the last couple of days, I probably won't be...)