Right you are, about the value of this web site for anyone interested in flags of "our war," and I heartily agree with you about the credentials of Gregg, Jim, and others. My own interest is as narrowly focussed as yours, and the fun is becoming "the expert" on your selected specialization. (Mine happens to be the signal corps, and to be even narrower, the CS Sig Corps!) One way of developing that specialized knowledge is by reading the expert commentaries on flag materials, manufacturing, distribution, and use, (and the fakes!)and transferring the knowledge to your own special interest, as appropriate. Then, one day, perhaps, you can answer a question posed by another inquirer and have the satisfaction of sharing--which is what this is all about: we learn from each other and we share with each other. We learn most from fellows who have taken the time to search out original records and painstakingly examined the original flags--maybe even tried to match the manufacture or studied color-fading. I'm sure you'll learn and find enjoyment in your own pursuits, and "good on ya' " for sharing the results.
Dave Gaddy