From the pictures I could not tell if the Bash plate you have built is for the GPR single pipe or not. I looked through the last few pages of posts but if it was written, I overlooked it so sorry if I am asking you to repeat somthing you've already mentioned.
All the same, could you please let us know? Also some indication of price point so I can start softening up the Missus would be good.
PS) Great looking work, BTW!