Simon, thank you for the Feedback. I will forward your comment onto the owner for an answer to your question. -ADM Accessories. Simon, I am sorry you are having trouble attaching the bar to the OTA. I do not include instructions, but I will explain it to you. The rear curved block attaches to the OTA using the two smallest screws (8-32’s). The longer (10-24) is used at the front end of the OTA. It will pass through the bar, through the second curved block and into the OTA. This leaves you with one screw which is used to attach the bar to the rear curved block. LMK if you have any questions.