Hmm, just wondering if any other modellers here have had this problem. I use Sketchup to make all my 3D models, as it is a free platform and i find it easy to use for most cases. Now, to save costs, i like to combine my models into one file, to save on teh startup fee per model Shapeways charges. However, it seems whenver i import anything into my Sketchup file, and then export it as a Collada file, it fails. For example, i have a model uploaded here by the name off "Basic Gun with Bayonet" (or something like that). It has two cylindrical barrels touching each other, so is non-manifold, but uploads just fine as a collada file. I then take another sketchup window, and import 2 of these guns. The file again is exported as a collada file, but fails to upload, saying "the model could not be validated". The error explanation given is that the "dialect of STL is not recognised" It tells me 9 times out of 10, Meshlab fixes the issue. I have meshlab, tried it, it doesn't work. Plus, why does it say my STL dialect is not working, when i'm using a COLLADA file? I've had this issue with some other models too, the only thing they have in common is that all involved importing existing models. I have tried everything, exploding all components, and nothing works. The only way i can upload is to either draw everything again from scratch (which takes too long for most models), or change it to an STL file, which Sketchup can't export as. So, i have to have someone here do it for me, which is very iconvenient and sometimes ruins the scale. So, has anyone else had this problem? Is it a glitch with the upload, or just me?