Thanks Martin, G'day Graeme
He's probably got a good memory...
Hmm maybe, but the short term memory's not so hot, I'd forgotten I got it last Jan
, maybe there was a glimmer coz I did think it had been before and checked it on Mel's list but didn't find it, however, I only looked for Rubik!!
What I did remember, was looking for Richard's challenge a year earlier and finding the R-18 then, that wasn't the challenge, but the shape was logged in memory
http://www.pprune.org/aviation-histo...lenge-445.html