The Lego Shuttle Carrier Aircraft is exclusive to Lego Insiders until May 18, but signing up is entirely free.

LEGO says the Icons Shuttle Carrier Aircraft set will become available for insiders on May 15 on its online store, with the rest of us getting access to it three days later. The thing is not cheap ...

Hence it being slapped on the back of a Boeing 747 instead, a feat Lego has now immortalised in brick-built form as an Icons set for NASA (and, we guess, Boeing) fans: Shuttle Carrier Aircraft. So ...

and two classic US aircraft, the E-2C Hawkeye and the now infamous F-15. We talked with Ralph Savelsberg, the LEGO master behind them (you asked for these interviews), about how he builds them.