I put my rifle with the barrel pointing left and the receiver lying flat in my padded vice. I grab the lever with my left hand with my middle finger through it and my thumb opposed on the outside. As I pull down on the lever, I also pull the lever hard left and as it comes out of the receiver the link clears something and you'll feel the lever move slightly left. This releases the hammer so you can push it forward all the way to the back face of the breach block. Slowly continue to slide the breech block out a little more and you'll feel something bump or kind of hang up. Now slide the breech block back in just a smidge and pull the front trigger and begin sliding it back out. You might have to try that a couple times to get clear whatever it hangs up on. Make sure you're pushing the hammer all the way against the breech block with your right thumb at the same time, keeping it tight against the breech block.  Keep pulling left on the lever while doing all this. Good luck. Hard to explain but I'll comes with a touch and a little luck.

I have removed breech blocks hundreds of times from standard, SST and CCDST high walls by just pulling the block out of the bottom while sometimes playing with the trigger to back the sear off and also getting past the extractor. My new DST high wall will not let me do that. I have to back out the lower tang to remove the block. Is this normal?

Thanks

Jack