Moon Clock Weight Shell issue

I have not tried the scarf function on gears but I think it would work well on the "gear 0 pallet" and the winding drum, and probably on the "wacky gear" types with continuous curves. However, I was planning to try simply "painting" the seam for the conventional gears as on the moon phase clock in a non-critical location such as the lowest point between two gear teeth. Orca allows the user to paint the location of the seam.

I really enjoy building these clocks. Clearly the weight shells have been adequate for the intended function, and we shouldn't expect clock parts to survive being dropped on a hard floor. But it does appear that just extending the ribs below the axle hole to a point below the level of the floor of the pulley groove would significantly improve the strength of the weight shell in the hands of someone clumsy enough to be dropping it. That occurred while I was polishing the weight shell. I had printed that one with "random" seam and was trying to improve the finish which ended up with all the pock marks and looking a bit like ostrich hide. I can polish the silk copper filament objects to a fine gloss that looks very much like polished metal but the seam marks don't go away. So now I just use the scarf function. I am doing a weight shell design externally the same except for longer ribs inside and closing up the sides of the pully slot somewhat (which obviously complicates putting the string around the pulley a little). Will see how that works. Maybe even drop test it.

Ironically while writing this my eight-year-old grandson managed to break the "Power Pro Red" 65lb test string while winding his clock and dropped the loaded weight shell on his hardwood floor. That weight shell shattered as would be expected dumping several pounds of steel shot all over the floor. But he and his sister had considerable fun cleaning them all up using magnets and are still playing with the magnets and shot in the bin where it is collected. That weight shell burst from what amounts to internal hydraulic pressure fracturing in the middle of the cylinder but both the top third of the shell and the bottom section (one extension) survived intact. The main fracture lines run vertically along the long axis of the tube (and not much on layer lines), which is how a pressure vessel normally fails from excess internal pressure. That does suggest that the basic design and wall thickness are plenty good for handling the weight of shot and hanging on the string. The issue there was the string. Surprising that 65 lb test string would break (and not at a knot or around the screw holding it on the frame of the "32 day clock"). So I tested string from the same spool as used on that clock and found that it breaks consistently at only 20 pounds. From an engineering point of view, that is barely adequate for a 7 to 8 lb load especially under the management of a curious eight-year-old who might be inclined to tug on the weight shell or something similar. So I am now shopping for some stronger string and will test it before using.