The stl file does not work properly, that is, there is a loss of data of all the rear wheels when the asked fixing by the software is performed. This issue has to be fixed by the seller. I notice the product file is written stl in capitals, can it be an issue? Second, once the repair is performed, the file can not be converted to a stl file ready for printing Then, Chituba recognizes a 3 mf file that is actual size of the model, to be reduced 50 times for my needs. Pretty tough to be done accurately. There is a huge discrepancy between what is supposed to be purchased and what I bought