OK, found it myself. Just so everyone knows the plane, here it is:
http://www.spadtothebone.com/SPAD/Spadet/

Definitely go thru the firewall. Determine the engine and mount locations and then choose a routing for the fuel line and throttle linkage.


BTW - not trying to chase you away but there is a SPAD forum with some very experienced people there on SPADs. People here are more into balsa but not exclusively. This is, of course, just my opinion.