I purchased a new RWS Diana 48 in .22 a couple weeks ago. Initially I ordered a 1" RWS mount but after talking with Leupold I decided to use a 4.5-14 that I had on the shelf so I ordered a base that I could use my Weaver tactical six screw rings on. I've finally got time to shoot a little, boy do I have a lot to learn about shooting springers.