sorry the internet is not a friendly place for understanding each other. My apologies. yes I have used the Time-o-lite with the Aristo cold light head. I dont think there is a way to store 2 separate times with the Time-o-lites I have used. I would suggest writing the separate times on a piece of paper and just making one exposure with one filter and changing the time and the filter and making the next filter. good luck on your quest.