"Just for info, my local gun smith also turns out the Linebaugh revolvers..."
I've seen Linebaugh copies made by other 'smiths. Beware that they do NOT all build guns the same way John does. I asked one of the "custom" 'smiths about how he opened up the frame window for the larger cylinder (Linebaughs cylinders for 475 and 500 are larger diameter), he replied that he didn't, the cylinder was the same diameter. That's all I needed to know about that 'smith and his Linebaugh caliber guns.
I've seen Linebaugh copies made by other 'smiths. Beware that they do NOT all build guns the same way John does. I asked one of the "custom" 'smiths about how he opened up the frame window for the larger cylinder (Linebaughs cylinders for 475 and 500 are larger diameter), he replied that he didn't, the cylinder was the same diameter. That's all I needed to know about that 'smith and his Linebaugh caliber guns.