Larry I used Balsa wood. The one advantage of ex GWR lineside fencing is that the wire is on one side of the post. it takes me about 20-30 minutes to do a 12 post run. Each end of the jig where the lines are drawn has a notch, and your chosen wire? in my case eazeeline is notched and taped. The posts are the placed under the wires and a dap of superglue is placed on each wire as it crosses the post. Hey presto job done. I do NOT strtch the Eazee line as when you cut it fee it contacts into a ess. As tou might guess I learnt by experience..
A quick snap slightly out of focus I'm sorry to say. when put on the layout the post was pushed behind the grass so the post and the wires are against the backscene,