I have one of Stukey's shooting benches which I absolutely love http://www.shootingbenches.com It is well constructed, very stable and easily portable. However, I found that when doing load development on big bore rifles I prefer a more upright position. Therefore I decided to make a set of longer legs to suit this purpose. You can see from the manufactures web site how these attach. I simply copied the idea, bought some pipe, did some welding and had them powder coated to match. The rifle pictured is my 7mm RM, not one of the big bores, but it's illustrative of the idea. As it's all new today, experience will tell whether or not my idea pays off.