As an alternative to traditional bellows types, one often meets with what I call the 'floating pan' reservoir. I understand that there are several names for this type of reservoir and some even call it Schwimmer type, I believe. We all know that the use of adequate electric blowers has tended to relegate the reservoir to more the role of a regulator. In this connection, I'd be interested to know if, and how, the size of such reservoirs can be equated to the 'stop value' of an organ. Also, what part the choice of wind valves plays in any such calculations; that is, whether an inboard valve (inside the reservoir) or external slide or roller valve. All views and comments are most welcome. Thanks.