Thanks guys! I hope to be able to continue with stencils this evening.
I've found the Revell/Monogramm Spitty 22/24 instructions (which can be found in PDF format) help quit a bit to figure out where certain stencils go. The airfix instructions don't go this far as there's only a hand full of basic stencils that go with the kits original decal sheet, and the aftermarket decal sheet does provide extensive service markings, but only partial instructions (on a very small profile) on where they have to go.