Can't blame Wardley for being concerned about stalling, taking it Vampire did it when that was being built. Ruddy Arrow...
I don't think B&M do pull throughs. The maths is there and they know, unlike Intamin, they're pretty perfect at formulas. They're just all around, a better quality. I remember being at Thorpe once in the snow in March. Saw and Colossus couldn't open, Stealth did but closed first of the lot. Inferno and Swarm went till it was about -2/3 celcius. Quality.
Mako looks great! Don't think it's been mentioned on here, could this possible have been a shelved plan from a while ago? It just seems to fit so perfectly around Kraken. Is it possible Manby took over, saw this plan and went "right, lets build that thing please." Interesting thought for sure.