You used a clever strategy, considering the capabilities and limitations of your equipment. My observations on the previous night also were invaluable, helping me to familiarize myself with the field, and to convince me that the spotting scope and its altazimuth mount were inadequate to find and track this object.

I also had other great advantages: a wide field
(100mm f/6) objective, an equatorial mount, and a correct-image erecting prism that allowed me to see an image that was left/right and up/down correct. It made matching up what I saw through the eyepiece and what was on the chart much easier. I don't have a clock drive on my scope, so I had to be constantly adjusting in RA.