Hi,
these things may seem prehistoric, however, they were the bomb! remember in 1982 the only cams we had were FRIENDS wi the rigid shaft and the smallest was a #1. When 0.5 tricams came out they were the greatest thing going for horizontals and difficult placements. Used a #6 and a #7 for off-widths too; however, the big tricams had a tendancy to fall out of the crack. Thanks for the post - remindsx me of the old days.....