I have a number of items from Ray-Vin including two stands I used when shooting Palma and other long range prone. Great stuff. I would buy the Ray-Vin if I didn't already have a Sinclair bench stand. The Ray-Vin looks to have easier adjustments than the Sinclair. As I already have the eclipse head for my Kowa scope I may just buy the parts that I need to make up the whole stand.
Also, the customer service from Ray-Vin is just like Dillon, second to none. I had the post office sorting machinery grind up a stand segment and Ray-Vin replaced it at no cost and they dealt with the post office. Great people.