If I cut a pc of 0-1 or 1084 about .5" thick.... drilled, countersunk for machine screws, fastened to a pc of softer steel for bulk and weight....what Rockwell hardness should I heat treat the face plate? Overall size would be about 5"x5"x5" with about an inch of the heat treated steel hanging over for hardie, etc. Thanks. Any better ideas for a steady as I don't think any are available for sale and I've been looking on ebay for two yrs!