My fear is that I would not be able to scale down the parts of the 3d model. but I was able to scale down the parts to a working size without any issues, purchasing the items through PayPal was quick and easy, If you need a file and it is on sale, go for it. models are well done!
I was not sure that whether I would get a 3D model or a kind of software to build up the model, I got timely responses to my question . Also very nice models with a wide variety and at reasonable prices.