I had issues with this model. I could not slide it on as the protrusions for the screw holes were blocked by the inner sidewalls. I Dremel'd them out so I could slide it on. Also the inner sidewalls were a bit to wide (it left a gap between trigger frame and grip). I think the gap could be closed another 1-1.5mm. Next, the screw holes seemed to me half a millimeter to the bottom and back. When I pressed the grip on to align the holes, the layers split. It was on the section that rests in the V of your hand between the thumb and index finger. This area seems a bit thin and could be thickened up on the outside. Given that this model has to be printed vertically, it actually makes it weaker as the layer bond has the least strength (at least, for cartesian fdm printers). I am considering cutting the model in half and printing it flat. If the original cad file is available, I wouldn't mind remixing it.