My flute model isn't quite hollow

I made a model of a simple flute (fife, actually). and ordered a print in white strong&flexible. It came with a plug of material about 2" long about halfway through the bore, between the finger holes and mouth hole, so it doesn't actually work. I just checked my file again and it looks fine to me. Any idea why this would happen? That was a rather expensive mistake

Are you sure that the blockage is solid?
It could just be 'loose' powder that is stuck in there.
Try pushing on it with a rod or stick.

I tried... It's pretty solid, but also powdery. Maybe I can punch through if I'm persistent. Thanks for checking it for me.

That was it. I punched through and now it works. Thanks!

Congrats.. Now, let us hear it...

Here you go. Caveat; I play irish flute but don't really know about how to play a fife properly. I want to make a 3D printed copy of a 200-year old flute that I own, but it would cost so over $200 to print so I modeled this fife based on a known design from a book so I could try something much smaller and cheaper first. I wanted to be sure that the texture of the material wouldn't prevent the instrument from functioning properly.

I made a recording last night but it didn't sound as good. I decided it was probably because of the texture of the surface making it hard to get a good seal on the fingerholes, so I sanded the outside with 500 grit sandpaper and it made a big improvement.

Very nice.
Just be aware that WSF is very porous. So be careful of the build up of saliva. You may need to seal it.
Have a look on post production techniques. https://www.shapeways.com/forum/index.php?t=thread&frm_id =95&

Oh, it is beautiful! thanks for sharing.

Sounds good... now can we SEE it?

I recently modeled an Ocarina for printing in ceramic but it was ridiculously expensive. Too bad. Maybe I can make it thinner and print in WSF.