It's been two years for some and a year for others. All are good hunters. They get some attention prior to the season. A tightening of the security lock and chain where needed to prevent girdling the tree; a loosening and repositioning too where tree overgrowth into the chain would occur; a footrest of new timber when one rots and the metal leg sinks through; canvas when ripped or too loose for my taste. Corrosion, repainting, nuts and bolts, metal tubing fatigue in general is accepted without question if a good sturdy shaking doesn't loosen things.
Is there more?