Originally Posted by camelgas
H/H: What are the holes in the docking arm receivers for, sprung pins ?.
Sorry Camelgas did you mean the upright tube? or the brackets that hold them?
The plan for the tube is nylon pipe- to act as a roller and it'll be a bit more sympathetic than galv tube rubbing against the boat (which reminds me I need to drill another hole at the bottom of the tube).
If you mean the bracket that they slot into (on the trailer chassis) the holes are for weld nuts so I can use a "hand knob" to tighten it up.