The SS65CS is the only lock that they recommend and may be the only one that fits. The A-P Pin was designed around (or literally inside) that lock.
I have two pins, one through the garage wall from the outside with their bloody great spreader washer under the head. One end of the chain is over the inner end with a 65 on it.
The other pin goes perfectly through the hole through the frame of the K under the swing-arm pivot and the other end of the chain is over that pin with a second 65 on s set-up was the only reasonable wayof securing the bike at the previous house which had no garage, a brick sett drive and a convenient wall.
In my current location there are too many links in the security 'chain' with this set up but I sleep at night...who wants a second-hand K anyway.
I bought an Almax chain together with one CS65 from Almax before I discovered Pragmasis. My old Sold Secure wall anchor was the weak spot; a scaffold pole would have levered it out together with three bricks and the gas meter!
I wanted a second CS65 for the Pin but Almax were not in the least interested in supplying it keyed alike to the original and teo keys is a nonsense.
The guys at Pragmasis supplied the Pin, one new complete CS65 and a new barrel for my original lock, keyed to the one they supplied.
For those who haven't shopped at Pragmasis, I can also highly recommend their Shed Shackle, a medieval torture device you bolt through your shed wall and chain your bike to it. I used it for my bicycle but if all you have is a timber shed then you would have to dismantle, cut through or totally destroy the shed to get the shackle and the bike away.
I doubt there is a lock that can't be picked and as the old adage goes, if they want it, they'll have it.
As the old lion hunter joke goes, 'I don't have to outrun the lion, I only have to outrun you!'