Hi HAIRYKIWI :-)

I found the problems in the NACAAirfoil script:
At line 595 in the js you find this line:
"FactoryAirfoil.setInput( g, PointObjectListUpper.item(num_stations - g).pt.get );"
this ".get" seems to be not toleratet by V4
just delete the .get to "FactoryAirfoil.setInput( g, PointObjectListUpper.item(num_stations - g).pt"
repeat this to every line where you find this ".get" and it will work

Or just take the js in the attachment