I had a solid block spacer at first but the bolts are long and can't take the strain, resulting in them failing and the spacer falling out on articulation; a real get me home nightmare!
I good guy in my club then made me a 2" 3 piece one as above, with the 4 original bolts 9 1 is shorther thatn the othr 3) and 4 new short ones - much better, and a worthwhile modification