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Hello Michel,I am following the build of your Bugatti project with great interest. I am full of admiration for your workmanship.You have reached the part which is of great interest to me. I have been waiting to see how you would built the Crankshaft. So you are using roller bearings and needle rollers in the same way as the original engine. I can see that you have assembled the crankshaft by pressing together the individual sections. Please explain how you achieved the perfect alignment between each section while it was being pressed together. There must be at least 16 sections that need to be in perfect alignment. I congratulate you on the achievement.With an interference fit of a 10th, I don't think you can press a section apart or twist it to make corrections. I expect you do not get a second chance, the alignment must be perfect the first time. Please can you explain how you achieved this engineering miracle. Do you have photos for the fixtures and fittings you used and also the press you used.I can see four holes in the centre of each crank web. Is this a clue to how you achieved the alignment? It would help me tremendously with my engine if you could provide additional detail of how you assembled your crankshaft. My Mercedes engine also has roller bearing mains and con-rods. Thank you for sharing this excellent build with us. I wish I could help you with the ignition problem, however you are getting some very useful advice from the other MEM members. They must be some of the most knowledgeable miniature engine builders in the world. You are in safe handsThank youMike