Sorry to hear that. 3D Printing
Services are extremely expensive and you are the first person I've ever heard of actually using one, so I'm not surprised at that price or the quality of the parts you received. I don't know about Canada, but my small, rural town has a 3D printer at the local, public library and would charge several dollars to print those parts and would have done a better job. Unfortunately your service didn't use the instructions provided above in #2 to give the best parts. However, if you have expectations of any 3D printed part looking like an injection molded model kit part, you'll need to adjust your expectations. They will always have the layer lines and do require sanding.
The cowling is particularly difficult to print because of its shape, however, I designed it to be scale to the real thing, and
not to be easy to print. It is unfortunate that they used what is called a
Raft which is typically used on poor quality printers that have a hard time getting the first layer stuck down. They should have put the part flat on the bed and the front face would have been perfectly smooth and not require
any sanding and you would have the holes nicely clear. The only sanding would be required as it curves up to the sides. The grid pattern (Teal color below) around the perimeter is called
Support and holds up the print as it curves. It should be easily removable with just your fingers if properly configured. Here is what it should look like.
Besides the pictures of the finished, painted parts by me and others above, I also used the same cowl scaled up a little larger on my
Fokker D.VIII. On those pictures, you'll see where the cowl has been sanded, but the other parts didn't.
They also printed the
guns and
side fairings in the wrong orientation (per #2 above). They would not require any
Supports or any
Infill. I image your side fairings are pretty heavy. Done properly, they will weigh about 7 grams in ABS. If you use LW-PLA, the weight will be almost half that.
If you plan on doing any printing in the future you'd be far better off just buying a printer and doing it yourself. I've seen
Ender 3 on sale for as low as $130US. I know a few people that have gotten the newer
Creality Ender 3 V3 SE and have said it's a huge improvement. The plastic cost for all the parts including the wheels is less than $0.50 US. As you see above, the cowling alone only cost about $0.05US!
Good luck on your next try.
