Anyone using SRF08 ranger on address other then 0xF8?

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I've got a single SRF08 ranger running on the supplied 0xF8 address, but I can't get it to work on the other addresses (I need several sensors). I have verified the ranger to be addressed to 0xE8, but the ranger does not reply to either the programmed address 0xE8, or the +4 address the author uses for subsequent calls.

The author suggests:

New_Address += 4; // offset address not sure why this is but it works for this address

http://www.ros.org/wiki/rosserial_arduino/Tutorials/SRF08%20Ultrasonic%20Range%20Finder

I have implemented a multi-ranger program in the past (on a 2620 PIC), and I didn't need to do any "+4" trick to get it working. It also worked on all six addresses. I have not yet "ported" my my code to the Atmel (I wanted to use the Sonar_srf08 library).

There is a newer version of the library, but it's essentially the same, just added gain and range parameters to several wire.writes.

http://playground.arduino.cc/Main/SonarSrf08

Any ideas or fixes?

Thanks, Alan