Hi Everyone,, To respond to the several responses that have been made in the last 10 hours, I realise there might be issues with the headstock gears and bearings, and I believe more risk with the gears. I simply will replace the bearings with the best I can buy if they fail, and likewise with the gears, that said, I repeat my previous comment that I don't intend to use 2500 RPM except on rare occasions, for small jobs. I also would not use a chuck or faceplate at such speeds, because there is too high a risk that they will disintegrate. Collets would be my only choice at 2500 RPM. I remember as an apprentice using a high-speed Chaublin lathe for small work and it was only used with collets (a very nice lathe, I must say!). Another reason for the 2500 upper limit is my opinion that the present maximum RPM of 1440 RPM is limiting. Many jobs will not be machined at their correct cutting speed at this limit. Coolidge's suggestion to use a proximity sensor and vfd electrical brake is interesting and thought provoking.