I've just picked up a second-hand Cateye Cordless 7 cycle computer. The trouble is that it doesn't transmit very far, and certainly not as far as the handlebars where the display unit is. I've replaced the batteries, so it's not that. Performance is impeccable at 2cm, reliable to about 15cm, but completely loses the signal at any more than that, and nothing like the 70cm range in the manufacturers' blurb. Has anyone else had this problem ? Is there anything I should try, or do I just chuck it away and go back to wired ?