Angier, my two cents worth:

Hinges 'n pins are quite a bit more work but all the nicest Lancairs I've
seen at the Redmond fly-ins have them. It seems to me that the less screws
you have to screw with when R & R'ing the cowling (which seems to be done a
lot), the longer it stays looking good. The cowling will inevitably get
grunged up over time around the screw heads no matter how careful you are
during R & R.

I used the H & P's along the sides with screws at the fuselage junction and
now wish I had had more patience and used that technique there too. At least
one beautiful LNC2 seen at Redmond this year had his that way and the
results were absolutely gorgeous!

Even if you're not building a show airplane, I recommend going the extra
mile and using hinges and pins all around.

Dan Schaefer