If you want more pics or more info I will post more.
Bernie
It's not homemade, but I invested $49.50 on a Lee Valley/Veritas tool rest and love it. Very versatile, fully adjustable, well made. It has a horizontal groove for sliding jigs left and right, and I've made a few jigs to make it easier to sharpen lathe tools, (I'm not skilled at freehand grinding). With mounting holes in front of both wheels on my grinder and wing nuts on the bolts holding the tool rest, I can move it from the coarse to fine wheel easily.