I've removed the yolk on a DC50 and it's not a job for someone who had NEVER worked on one before, it's very involved!
Appreciate it's not much help, but as there are no stripdown guides for a DC50 or 41 (yet anyway...), I'd proceed with caution, and take lots and lots of pictures as you go! Took me an hour and a half to get the motor out of my DC50, the yolk was the 4th thing to come off. Then another 40 minutes putting it back together. I put some pictures up in my DC50 post if it helps, no idea how similar the machines are