Peter those little black ones? Your spot on. The silver ones aren't much better, the little spring contact touches the metal chassis and the light doesnt' turn on. However there seems to be two types in the silver ones. One type is on/off the other is a graduated illumination which seems to work ....... better???? just.
Ended up with two rigel pulse illuminators. Haven't look back. HOWEVER its a challenge to work out how to change the batteries
. Maddening actually, but there is a way. For a substantial fiscal outlay I can reveal the secret to you when you need it.
