How to run the static line
Typically the static line to the panel will pass through the cockpit area just beneath the top longeron (rather than under the armrest, although some might). There should be enough space at the top of F604 to feed through 1/4" tubing without drilling any holes there. For the next bulkhead aft, Vans suggest to drill a 1/4" hole for the tubing near the top of F605. No grommet is required. Note F604 is very structural (in a crash) and should be left alone if you can.
Assuming that your existing pitot and electrical wiring are on the left side, you can run the static line on the RHS of the fuselage and tee it into the static system tubing that connects the two side ports behind the baggage bulkhead.
Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Airframe structure 95% complete, now working on integration, plumbing and wiring.
Flying my Aeroprakt A-22 STOL and the aero club's RV-9A while I build