Re: Ray-Vin Stand
I went through 2 cheap option stands, and was frustrated with both before I decided that quality is worth the price and bought a Manfrotto 190. It goes almost perfectly flat, the upright can be switched to be parallel with the ground and it gives you great support on uneven surfaces. The only drawback is that you need a fair amount of space for the legs to be spread out flat and the spotting scope close enough to your eye to negate the need to completely break cheekweld etc.
Also consider the sheer weight of a lot of spotting scopes. I have a Zeiss 65mm and on the cheaper stand, in even a slight wind, that scope acted like a sail - a heavy one at that. Some quick reflexes saved that spotter from the concrete at Angeles.
Good luck.