A314 alternate versions

I’ll admit I only check up on the forums from time to time, so I’m definitely out of the loop here so I apologize if this has already been discussed and I missed it.

I was wondering though what’s the deal with the alternate versions I’ve seen people discuss (extra none, ultra fine, rev 25, etc)? I just checked and I currently have rev 23 which from what I gather is the standard version. Is there any extra info on the other versions available and is it possible to buy these or are they only available to special product testers?

You’ll probably be asked, if you qualify.

Honestly.

A314 is perfect. The special editions you can mimic, except probably Ultra Fine edition, through addition of the Instant Line products.

It’s not like its a super magical concoction that differs greatly from the Normal A314. I still use my Rev 23 daily and bearly break out the A314 SBE unless I’m in the mood for testing.