Thanks, another option. I'm currently on my uppers, so have been looking at machining an angle on the 20mm spacer that sits beneath the riser proper. Just need 12mm clearance. The original site for the decompressor is blanked off and I don't know what is/isn't inside the casing without removing it, so I'm going to leave it on the bar for now and maybe look this winter. Looking over her, I just found 3 of the 4 bolts that hold the headlight brackets on were missing! Sorted now.😀