Doug,

My understanding is that the F&P machines require a "pure" sine wave inverter to work correctly, not a "modified" sine wave inverter as suggested.

You may need to check this out in case it puts your machine at risk.

Actually our holes are normally impatient, and with a left-hand thread.

Now, do you have any association with Fisher & Paykel? No Bill, I too am just a user of their products, and those of Resmed, Tiara and occasionally Respironics. I am however a respecter of ethical practice. And while there may be no legal reason for Resmed to acknowledge the value of F&Ps discovery...

Looks like they have copied Fisher & Paykels "lots of little holes make it quieter" exhaust diffusion method to quieten the bloody thing down some. As far as anyone can tell, the Opus and Swift II are concurrent designs from their respective manufacturers, and both came to market at pretty much the...

It will be interesting to see how the Opus compares with the new Swift II which, according to an earlier thread, is to be released in the first quarter of 2007. Incidentally, cpap.com did not know whether they would be carrying the Swift II - very interesting comment from them. Couldn't find the ot...

I got a decent fit with my 432 by judicious application of a sharp knife blade to the offending grey foam around the top of the mask. Removed enough to stop the irritation caused by a fat bridge (or is that widthly challenged in PC). I prefer the 432 'cos it is way more robust that the Resmed UMFF, ...

I've used straight tap water for three years without incident. This is mostly in Fisher & Paykel machines with the disposable chambers, so they can be very succeptable to mineral deposit buildup, pitting and then holing. (Ah, but the humidification system is special, and well worth replacing chamber...