A 3D printer would be the ultimate
Could you imagine having a 3D printer to make parts for your airplanes?
That retractable tail fork that you were thinking about buying just doesn't look quite scale. If you knew how to input the data into a 3D printer you could make your own.
If you have the time then check out this video http://www.ted.com/talks/lisa_haroun..._printing.html
She said they are available in desktop size for $300.
I think this could change everything in the future.