So its been happening more often now. I've counted a few times this week now. Hot or cold it happens. Is it the starter contacts or something worse?If its the contacts where do I get them? I've got a cummins parts dealer a block away!

That starter is set by the bolts that hold it together. The brushes are 180* apart for the 12v+ so as long as the bolts are in the brushes will be in the correct position. I would like to see a picture of the other side and wonder how the brushes looked in relation to the commutator.