I have seen all of them, Dave is a fantastic builder and designer in the R/C scale world. I first met him at a contest held in Colorado way back in the mid 80's. he and Frank Tiano are the founding fathers of the Top Gun event held down in lakeland Fla which is a big R/C scale contest.
Every now and then a set of his videos will show up for sale in some of the R/C forums like R/C Scale builder and others, and your correct in that all of his painting and weathering techniques can be applied to any models of any scale.