P10 - medium or large pillows

[Chilehead]

The medium pillow on the P10 fits my nose the best. However, the openings are a bit smaller than those on the large pillow, and it's a noticeable difference in breathing effort. Because of this, I've been using the large pillows even though they feel a little big for my nose.

Has anybody tried making a larger opening in the medium pillow? Maybe I really need a medium-large pillow which doesn't exist.

[chunkyfrog]

Switch back and forth. The answer will come to you.
Your nose will tell you which you like.
If you decide to try cutting, have a spare handy.
The cut edge will be different and may irritate your nose.

[Hang Fire]

the openings are a bit smaller than those on the large pillow, and it's a noticeable difference in breathing effort.

You are overthinking it. The machine will deliver enough air flow through either size without any difference in breathing effort.

Use the size that you can get to work with minimal leaks. As you already noted, the difference in the size of the openings is small.