The patent linked up there is not the lock Abloy are going to release. I actually prefer that design but Abloy have changed it and have re-applied for the patent.
They've actually changed a it quite a lot. 2 grooves? No, there are 3 now (Abloy are jizzing over the fact that this brings the number of differs up to 13.8 billion). The newer version has completely changed the way the core fits together. There is no longer an 'inner core', there is an inner core made up of sections that clip together. The sections act as disc housings, like the Tokoz Pro a bit but they are kept together by 2 thin bars. Why do this? Well in the patent they state it is easier to assemble like this...but I think it is to get rid of the cumulative 'slop' that can accrue between the pack. Abloy have been susceptible to the problems from this slop for...well, forever.
The closeness of the pack solves a few problems but it introduces new ones. The sections look very...sturdy, shall we say? But the real protection in this lock comes from the dual DBS bars. These are visible on the patent above, they live at 3 and 9 O' clock. The sidebar can't even be tested against the pack until both of these bars have retracted into the teeth at on the sides of the disc. This is the genius of this lock for me, it is incredibly beautifully designed. Even if you could somehow tension the sidebar directly, the DBS bars will still have to close into the pack before the sidebar is tested. If we compare DBS systems on this and the Protec then there is no contest. The Protec DBS is over-engineered and clunky and so very fallible. It is not an integral part of the unlocking mechanism, it is sorta bolted onto the side. It is a nice concept but the Groove pisses on it.
The payphone lock is the WE30C and is a superb lock. But its DBS is similar to the Protec in that it is not essential for it to activate for the lock to open.
Is it invincible? Don't be silly!
**EDIT** Where is Bulgaro's cutaway gutting? **EDIT**