About this 3D model

As the title says. it's a nosecone for a 17" Guillows stick and tissue Hurricane model. I can't seem to get all the errors out. Make Manifold keeps crashing the program before it completes the task. This is what I get for using Sketchup on a 7 year old lap top.! So if you can fix it so that the holes for the propeller print properly kindly send me a copy of the corrected file. In the mean time for the rest of you the markings turn up in the right place and about 10 minutes with a small round file will finish the job. Looks great on the Hurricane and my BNF Corsair too!