hvogt, thanks for the link to the manual which prescribes a very precise 214m take off roll with 450m to clear the proverbial 50ft (15m) obstacle. I know the usual caveats of ace pilot, new aircraft etc apply to the numbers but they don't, on the face of it, prevent ops from a 550m strip with a downslope.
DeltaV, I'd assumed that the Junior was an Annex II aircraft as it was on a LAA Permit to Fly. Aren't Permit aircraft, by definition, either Annex II or kitbuilt? On the other hand the Cessna 170 is an Annex II aircraft but isn't on a Permit. Confused? I am!!
Biafra Babies in action here
and here