Block and tackle balance help

Thanks for your photos. Based on what I see here, you have either our S380-32 or S385-32, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

Comparison of the S378, S380 and S385 balance shoes.

No, that's never been an issue in my experience. It's just a matter of your balance having been made by a different manufacturer. Ours still works the same way and will be compatible with all the same exiting hardware. Once installed, you won't notice a difference.