Review STL for FDM Issues

I have an STL created by another freelancer that refuses to print cleanly on my brand-new Qidi X-Plus II (Qidi 5). Layers start well, then the nozzle seems to drift in XY and the part continues a few millimetres off-track... (Budget: £10 - £20 GBP, Jobs: 3D Animation, 3D CAD, 3D Design, 3D Model Maker, 3D Modelling, 3D Printing, 3D Rendering, Solidworks)