Moving the exhalation port - matching the previous leakage..

I read some old posts about changing the exhalation ports on various masks.
The poster sealed the old ports, drilled one or two 1/4 inch holes in the mask where he wanted it and ran tubing down the air tube so that the exhaust air comes out under the bed.

Sealing the holes on a Swift would be easy enough, but how would you match the designed exhalation rates?

Is that even important?

I have oxygen cannulas, so I could easily get some tubing and I have small
1/4 inch type "connectors" I could glue in.

If you had...say...5 holes that were put in with a 1/8 inch drill bit (whatever), would you compute the volume of those 5 exhaust ports or wing it?

I am totally unqualified to make any recommendation in this area, but ... it seems to me that it should not matter since the same number of exhalation holes are used on every mask without regard to pressure used. A person can use a swift (or any mask, for that matter) with a pressure of 8 or a pressure of 15 without the need to adjust exhalation ports. With that seat-of-the pants engineering logic, I would think you would be OK so long as you have at least the same number and size of exhalation ports as came on the mask.

On the other hand, I could be completely wrong.

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