I am building something large (currently 3000 feet long) and I have used less that 10 fuselage blocks. These fuselage blocks have "Calculate Drag" turned off and are not scaled up but rather have really high values for their length, rise and run, hight and width values (done with overload mod). I have downloaded other even larger creations with many parts and they play and load just fine but when I try pressing play with my 3000 feet long creation with less than 10 fuselage blocks it will not load and it freezes my computer. why is this, do I have to build it small and scale up or is it something else, please help!