This is not a drop in replacement for 594 Mccarty SE tuners. The ferrules are a little bit (1mm) wider than the stock ones. So you have to “force” your way in. If you know what you’re doing, you’re good to go. Screws align perfectly and once the tuners are in properly, they work like a charm. Gotoh makes good quality parts.
Many thanks Thomann for quick delivery.