Here at our track in the U.S ,we use the I-LAP infered counter .It works on the same lap counting program as the AMB.The transponders cost about $40us comapred to the AMB $110US.Our track used it for the first time last season and it worked flawlessly.Even the hardcore AMBer couldn't believe how well it worked and how accurate it was!!For our track it cost about $700us for the I-LAP counter/sensors and we used the lapsfree counting program which is free download.
I-LAP website is
www.rclapcounter.com thw owners name is Craig and i believe he ships anywhere,just email him.
Seancormier
www.evolutionhobbies.com
www.evolutionrcraceway.com