It's not a great deal out if atall, I need a trimming light or tach gauge, I was wondering if there was a way to tell by voltage output from rpm signal. Anyhow a tip, needle off plug it in, ignition on and the needle goes to '0' position. That's how I initially set mine, I was rushing though, I think if it is out I could probably get it spot on! Haven't been keeping an eye on this thread as I've been readying some forged goodies and I think I may have a blown hg or an ignition fault so I'm busy lol. If the engine comes out I'll attack this while it's stripped. Let me know how you get on! Tbh I think I've had all my needles off now lol everything else functions spot on!