?? How much building/flying experience you got? ?? A biplane is not a good place to be learning this stuff. (especially when it comes time to put te wings on straight... and then learn to fly.)
If this is your first plane, GET A TRAINER! The Alb DIII wll die in under 30 sec as a trainer.

I generally try to get the pushrods into the fuselage just before sheeting the bottom. (I almost always do the top sheeting/deck stringers before the bottom) This gives access to grip the pushrods with a pair of needle nose pliers or surgical forceps to guide them through the formers. With a plane that has nice big holes in the sides and pre-located exit holes... like the 4*60, you can delay the pushrods until just prior to covering the fuselage. (still got access to guide the rods.) Never dely to after the covering is on... Its easier to work the covering around the rod than to try to get the rod in whenyou can't get at it.

Sheathed, flexible pushrode (NyRods and similar) You MUST firmly anchor the sheath at each bulkhead, or every few inches. You have a very hard time doing that if you can't get inside the fuselage from the side, to or bottom. You can trim the end where it exits the fselage, so there's only a small hole to poke after covering. The rod doesn't have to be in the sheat as you cover the plane. [img]i/expressions/face-icon-small-wink.gif[/img]

Pushrods built up from dowels and rod ends... (or CF arrow shaft. I wouldn't use square balsa on the plane you're building) can be passed through the formers after covering with use of NyRod sheath threaded through the fuselage after covering. However... PRE SHAPE the pushrod before the bottom (or top) goes on the plane. Its VERY hard to get a Y'd pushrod shaped right for a completed fuselage. (even if the kit has the shape planned out...) single ended pushrods can be agrivating to make after the fuselage is closed/covered. (nowhere near as bad as the Y'd ones.)