Oh, not my idea. My 7x12 came with the wire wheel stock. Just throwing the idea out there.
But while on the subject of 4x6 mods, here's a couple that I did.
The very first thing I made when I got a mill of my own. Rails to hold a baking pan as a chip tray.
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Before that I used to use a cardboard box.
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Drilled/tapped one hole to relocate the fixed jaw to move it closer to the blade for short pieces & allow for more capacity. The dynamic jaw is slotted so there was no need to modify it.
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Here's what the jaws looked like stock.
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