I just bought a Viper XTX se and just wondering if someone can tell me how much higher I can go with a riser without getting extensions? I'm 6'2" and I would like it 2-4 inches higher. As it sits, I'm slouching over while standing and can't get the leverage I want, it's just not comfortable. If I went with a rox adjustable riser, would I have to buy other things to make it work or can I just swap out what's on there already? Thanks