So when Harry's were first introduced / announced, this was some of the key information povided: -
http://www.bbkrclive.com/2010/Offroa.../RC4System.pdf
It covers most of what is being proposed. (Ommiting any backwards compatabillity issues)
RC4 firmware is a free upgrade of Firmware on RC3 decoders - or atleast that is how our RC3 decoder was sold to us. (See attached image - Decoder Upgrade Info taken from BBK site).
In contrast to this, the MyLaps site would have you believe it's not free.. (See attached image - MyLaps Upgrade). I think this may be a version related issue.
I'm suprised to read there is a new PT (Percy) offering the same features promissed with the Harry, but which haven't come to fruition after such a long time.
Hopefully Rob at BBK will provide all the facts and put us all straight. (or light the blue touch paper)
Certainly as a club, it is imperative that we fully understand the implications of carrying out the upgrade prior to doing so.