here is the final height of my cheek riser after modifying the adapter plates with two new holes per side. I also ground a depression for the nuts to sit in the buttstock so the adaptors sit flush. I now have another 3/8 height and was able to take the angle adaptor back off, preserving the short handy length I wanted. I had first experimented with the angle adaptor in unpside down to raise the cheek weld. Now i don't need it. I can also extend the buttstock two clicks and cheek weld on the tube for iron sight usage. It is perfect now. Look how high! And it still locks firmly in the horizontal grooves..perfect for me. And it is reversible if I get some lower rings. No big deal.