opinions please, 1st gear slider Options

[F4i]

This is a pic of my first gear slider. The dog teeth seem ok. What I am wondering about is the portion just rearward of the point. There seems to be some wear there. It could be machined that way I do not know. Should it be flat? Sorry for the bad description. It's difficult to describe. I know there are a few transmission gurus out there. Thanks

[lapuwali]

I think you're confusing synchros with brake bands. The synchro is the bit that matches the speeds, and it does indeed have a deliberately rough finish, to hold oil and essentially act like a fluid clutch. As they wear, they get smooth and a step forms in the band, so the clearance between the synchro and the teeth increases, and the speed matching stops working as well.

The brake bands are separate, and unique to the Porsche type synchros (as opposed to the Bendix-type synchros found on many other cars). You only downshift into first, so the brake band assembly is different on that gear.