qel baseplate conv kit vs QEL modular conv kit

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The Von Duprin EL33A/35A/98/99 device can be converted to the QEL device by getting the correct sized QEL baseplate conversion kit. The existing PS914 or PS873 power supply can be used. ...
The QEL conversion kit (3' or 4') and the RX switch kit (050251-00) can convert the 9927 to QEL-RX9927 device.
Kits are available per the following criteria.    Product Bulletin Required Series 94 or 95 Fire or Panic 3FT/4FT or 2 ft 6 in / 2 ft 10 in Finish  Optional LX...
See descriptions for the 09-992 thru 09-997 parts kits for modular mortise cylinders.  The 09-998 is a kit for a rim cylinder.      
Schlage has released a modular cylinder sales kit, part number 40-224.  It's contents and information can be found here.
A service kit is available, part number 40-223.  Product description available HERE. 
The part will be configured as CONVERT.XXXX part numbers. The customer need to specify the following criteria. Required:   Series 94 or 95, Fire or Panic , 3 feet/4feet or 2 feet 6 inches/2 feet...
See below for part numbers:  114317-00 QELA Mod. Conv. Kit 040061-00 QELA Mod. Conv. Kit w/Connectors 958002-00 HD-QELA Mod. Conv. Kit 040062-00 HD-QELA M...