I completed riveting the left elevator, using maily the pneumatic squeezer I was able to attatch the skin to the elevator frame using AN426AD3-3.5 rivets and AD3-4 rivets where directed on the plans. I also installed the riblet using MK319BS pulled rivets. In addition I also used MK319BS pulled rivets on the aft most rivets in the training edge where the squeezer could not get access, Note: This is also where I attatched the 0.032" doubler inside the lower flange of the E-606PP Aft Spar to reinforce the thinned countersunk material prior to the installation of the attaching MK319BS pulled rivets.