There exist little red caps that fit onto 66 blocks and binding posts. They're hard to find, though. If someone here knows of the supplier, I'll buy a few hundred. In the 60's there was a special red ty-wrap that went around/over posts/punches for ""national security"" lines. You had to cut same off to test, and {in theory} requisition a replacement. I've only see same in BSP's so I've no idea if they ever got much use. We used to protect leased metallic pairs in a simpler manner; we parked +130 Tip/-130 Ring on same. When Mr. Green put his butt set on same; if his fingers didn't alert him, the BANG in his ear did. -- A host is a host from coast to coast.................wb8foz@nrk.com & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433