I started the horizontal stab today since I'm still waiting for that replacement rib for the vertical stabilizer. Once that part comes in I will prime all the parts for the vertical stab and rudder then begin final assembly of both parts.
The spars for the horizontal stab are about 11ft long! It hangs off both edges of the work bench. There is a lot of tedious work in the beginning of this part. You have to cut out and shape some attachment brackets and match drill several pieces. I did all the cutting using my table saw, going very slowly, and the parts came out fine after sanding. (3.75)