Hi Gato
I was referring to the build method they used for the LR2.
Talking 4' X 8' plain Divinicell sheets and ripping it into strips and doing the cove routing method. H-80 Divinicell 3/8" thick, not Airex, and each sheet are $100 US at this point in time...and that is 1/2 of the list retail price.
In regards to the quanities I quoted...I was using the amount of material needed to build my F-14 design..so if the waste figure seems a bit excessive that's why...

I would have taken this to the home building forum but there is not a lot of action there...not that the F-12 is a fire ball either.