Hi Chris, the way I put the poly’s in is the same as your set up but I also fit it a Jubilee clamp over the leading edge of the poly, put a bit of pressure on by tightening the through bolt then tighten the jubilee clamp as much as possible to squeeze the leading edges together and then tighten the through bolt and it pops right in. Obviously removing the Jubilee once the edges are in. 👍🤗
2 more bricks in the wall. 🎉 I enjoyed that - there is nothing like watching a bit of perseverance and someone pulling through in the end. Great stuff. Keep up the good work. 💪