Having read this thread I really can't see why so many people are throwing their toys out of their prams!
AMB have upgraded their timing system - they have done it before amb20 to rc2, rc2 to rc3, so now we have rc4 - natural progression nice to see that manufacturers are developing their product. From what I have read it offers a few new features including the ability to have a few transponders with the same number - very handy for those that race more than one class.
MRT state that they can't clone Harry transponders so are stuck with using numbers from older ones so can only keep producing with a finite number of numbers and are also "cloning" another product
Having looked at the mylaps website they have information about rc4 which says that it is backwards compatible so will work with older transponders (if it works with older transponders why wouldn't it work with mrt ones as well? They show test figures for it on their literature)
Just follow this link and read their info about rc4
http://www.mylaps.com/kb/en/b2c/Tran...epaper_RC4.pdf
I'm just a relative newbie to this hobby but from what I can see lots of people are getting het up for no real reason
