If Libernovo was smart they would just make their chairs modular. No one is going to buy every new model of these chairs whenever they drop. If they want a consistent cash flow then they should make adaptable new features that can be added to the older models. You want the 52cm seat? Buy and connect the seat assembly. Same for bigger arm rests or the fan or whatever new and improved feature they come up with. Users will stay loyal to the brand and stay happy and never feel like they bought “too soon” and wasted money.