SRV steps on stage and plays someone else's guitar, amp and pedals and it sounds almost a like a shredder doing a SRV impersonation. You can clearly see him frantically turning knobs on the guitar, followed by hitting pedals searching for a sign of life. Finally resorts to the wah, which only really compounds the thin, cheesy distortion sound going on. Nothing Stevie could do but riff out because there was no tone to be had. Even the late, great SRV needed his refined rig to sound like SRV and produce his signature tone. And yes, I too can recognize his riffs. But this isn't about riffs. It's about tone.