Barrel wrench arrived today!
It was a good news/bad news thing.
The good news is that the barrel, barrel threads, and the inside of the barrel shroud were the cleanest/best lubed parts of the entire gun. (Of course, the lube was so old it was filthy, but it's all better now.
) The bad news is that using the gap gauge that the wrench came with sure left more daylight between the barrel and cylinder than what there was when I first got the gun. I figure this change will make the gun shoot differently. (Hopefully better.
Still waiting to find out what's going on with the scope mount. I contacted B-Square directly and they were willing to sell to me... at nearly twice the price anyone else sells the mount for online.