Has anyone changed the bulb/led/switch on the indicator button on the steering wheel of a R500D? I know there can be connection problems related to the detachable wheel, but I don’t think it’s that as the indicators are working fine, it’s just that the left hand bulb doesn’t illuminate. The pad is just velcroed on, but I can’t see how to dismantle it further. I was wondering whether the ring around the button unscrews, but if it does it’s on tightly and I don’t want to force it. And is there a replaceable bulb or does the whole switch need replacing?