Ah, finally back in the shop
This evening I started with a large block of 6061, 12 3/4 x 5 x 4.
The 1st thing I did was spray some ink on it, and scribe a pair of lines where it needs to be saw cut! Then I pushed it through my little band saw for about 25 minutes, occasionally putting some wax on the moving blade!
Then I setup my vise on the mill, and used my large fly-cutter to skim cut one surface. Then I flipped the block, so the machined surface is down. Now with a pair of Starrett Hold-Downs, I now have it setup for finishing the opposite side parallel. Then I placed the two machined surfaces between the vise jaws, and carefully closed the vise ensuring the part is seated between the jaws. Now I can skim cut one more side perpendicular to the last two. With one more flip, the part is ready to finish the last side.
Next I placed my large 6x9x12 angle plate on the mill table, right up close to the vise. After placing a couple clamps on either side, I dialed the angle in. Now with a side plate bolted on to the angle plate, I can put the big block in the corner, and use my large clamps. With a few light cuts from the fly-cutter, both ends are square. The overall length will be done later.
Tomorrow, I will add some of the details to this block, as it will become the newly revised Z-Axis slide block!