I have reposted the HO 1870’s articles back on the website. They include U-Link-n-pin coupling, lowering the Mantua 1860 boxcars and tender contacts for the Bachmann 1870’s 4-4-0 at:
Great job Harold. I have seen questions in some forums about this era but the site was gone. I know some will be interested. Hope you post this info in the Bachmann forums.