I have a Mahle top end for a 046/460 for sale. I had the chamber and base cut on it and ported it for a good running work saw. I won't post the numbers I used but it seems pretty strong. Blowing 180 lbs of compression with a meteor piston that's on my saw. I didn't put the new mahle piston on there to test it. It pulled a 34" bar buried stumping a maple off with pressure on it. Asking $400 OBO for the kit. I'll get pictures later and another video if needed before I swap over to a D cylinder for myself.