Drilled and reamed collar bolt and retension bolt holes on the nose gear strut to .249. Drilled flap lever bolt holes to #11. Experimented with the size of shims that will be needed with the engine mount. I was using 4 916 washers but two will be enough, so I plan to make four .120 shims. Finished riveting engine supports to firewall. Started preping all steel parts for painting.