Peter....Not to rain on your Parade.....but if the plans seem expensive @ $72 dollars...How are you going to pay to build the "Z" B-25?.....I've built 2 of them and your gonna spend no less than $2500 dollars ...probably more than $3000 to be realistic.......If money is a problem...I would go with something smaller....maybe the Wing Manufacturing B-25 @ 84" WS....Bill.......