While the vendor I bought it from is a very reasonable guy and it will be returned, comments on this are appreciated. So bought used. cleaned it. It will not tune regardless of what you do. Here' the details: did compression test for leakage and that was very good. Have a brand new Bob Reeves flugel MPC but tried other players MPC's (one is a pro) as well. No difference. MPC's seat fine. Even tried a different lead pipe...no difference. Tuning: for example a C to C, or C# to C# octave, you get the lower note to tune and the octave up is sharp and will not center even with varying pressure. Don't think it is valve adjustment. No dents or dings of any significance. Played it a bit during purchase but not extensively. For those not familiar with the 635T it has the 3rd valve trigger and slides on the other valves as well Comments welcome but this is weird. As my instructor said...get it out of your arsenal.