Great result, Joe.
Your report brought back very similar memories for me using my 140 refractor several years ago. I had exactly the same experience. About to give up and then suddenly it appeared in full view. From memory my daylight observations of Saturn were closer to Saturn's opposition, so it was marginally brighter and easier to observe with a smaller aperture.
Another day time project I have had some success with is chasing close planetary conjunctions. These are often reported as night time conjunctions for ease of observation. On a couple of occasions I have found the closest approach occurs during daylight hours and have targeted these.
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