Part II
When the bar is buried in the log past half way, the device can simply be flipped upwards so that it clips into a horizontal out of the way position like this.
Because the magnet is slid off the bar it comes away a bit easier than a direct pull away from the bar.
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View from other side.
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What holds it in place horisontal is this inverted ally "clothes peg"
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That took a bit of finessing to make but it seems to lock it very firmly because the vibe is pretty fierce.
When I next need to use it again the settings should not need adjusting since the screws should still be locked into the same place, I will just need to nudge the bar up to kiss the magnet which will grab it and hold it in place.
Another advantage of the anti sag device is that it can be used to hold the bar (and chain) steady when sharpening on the mill - otherwise the bar flexes back and forth like a yoyo.
One of the disadvantages of all this "fruit" hanging above the bar is that it is all the more to fall onto a moving chain, although most of the time it should just fall onto the board or slab being cut at the time.
As usual, proof will be in the cutting!
Cheers