i have ben trying to sort out all this information on this sight to find the best mcgizmo for me. i am a mechanic. advice for this type of work seems to be the mule. my worry with this is sometimes i have to pinpoint an oil leak in an engine bay and maybe pure flood is not the best. i have been carrying an aa so think that diameter works for me. my thoughts so far are a haiku or mule in single aa and hi cri. i am also having a hard time deciphering all the lead's. the other thing that i find difficult is there is lots of info but much of it is old so it is not so easy to put it altogether when people are talking in the past. i am very interested in your opinions. thanks