Hello fellow Atmos Clock masters out there.I believe we are a special group of clock-smiths that have tackled the hardest of them all!! I say this with deep regret that I have to ask for help which may be futile!! I normally have standard steps to return an Atmos back to perpetual running state. 1-Totally dis-assemble and check every piece for wear or damage. 2- I clean everything in Acetone/Toluene/Alcohol 3-3-3 solution and blow dry. 3- I check all specs for the bellows and run a test deflating and inflating to insure the power house is in good shape. 4- I dis-assemble the mainspring unit and completely clean the spring using same solution and then re-apply fresh high grade 'synthetic' oil along entire length. Re-assemble and check return spring and chain for any anomalies. 5- Check bushings and pivots on mainspring and first wheel. Use pith wood to clean bushings and pivots making sure there are no scratches on the pivots. I apply a SMALL amount of oil on these bushings. Thats all that get oil!! Put it away from this point out! 6-Once the frame and components are re-assembled I move to the balance. I install the roller assembly and while re-hanging the tube I partially set the beat to the flat side of the spring, which helps with final beat set. 7-After everything is installed and spacing at bottom plate is checked I turn the roller 540 degrees with NO POWER (do not wind) and I see how long the balance will rotate un-assisted. The roller should run 45-60 minutes minimum and come to the stop at beat. (Adjust beat if it is off). 8- I clean all bushings and pivots of the movement and check for scratches or cracked jewels. I re-assemble the movement (NO OIL) and do a final blow off of any dust or debris inside the movement. If I can apply a SMALL amount of power to the second wheel at the point of contact with first wheel and see the fork oscillate freely I consider my re-assembly correct. 9-With the roller at beat I install the movement and correct the set of the fork, making sure it does not contact anything but the roller. This is probably one of the most important settings so beware. After temporarily placing the minute hand on the movement I wind the clock manually and turn the roller to the 660 degree position, place the cover and carefully start the clock. 10- Nothing to do but wait and pray after starting. Now my question.....this is truly embarrassing. I have a clock (Pictured) that I have done just as outlined. I, for the life of me, cannot find my error point. The clock only runs at most 45 minutes. There is a serious point of friction and I am darned if I can find it. I have dis-assembled and re-assembled this darn clock three times!!!! Same result. My only point of suspicion is the fork. I see a good snap to the right as the roller passes but a rather lackluster movement to the left. I am going to increase the spacing of the fork on the roller to see if it helps. Can anyone with more experience than me , give any hints on where to go now?? I'm stumped. Most of my clocks run with litle problem......this one is a problem child!!!!!