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I am lumping these together since other than the miter gauge, they are quite simple or very similar to Mark 5/V versions.

The distinguishing detail of the Mark VII miter gauge is the segment clamp. Instead of a knob, a lever clamp is used.

[ATTACH]21502[/ATTACH]

This clamp 'handle' has 'wings' that allow accessing it from either side of the safety grip handle(which has been removed in the pix).

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The only adjustment possible is the accumulation of washers between the lever and the segment. Originally(OEM) they consisted of two flat washers and a 'conical' washer. The conical washer provides some 'spring' action. This screws directly into a tapped hole in the miter bar with no 'stop' to make the screw tight.

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FWIW a pair of 'special washers'(thin) were between the segment pivot and the clamp area bottom. I will determine if they provide proper squaring of the face of the miter gauge at reassembly. The segment appears flat across the bottom. The second 'special' washer rests over the hole to the left which is for the lever clamp screw.

[ATTACH]21505[/ATTACH]

Other than the safety clamp in the next post, all the rest of the miter gauge is the same as a Mark 5/V and is not shown here. It does not have the t-slot washer and screw etc. It has the tapped hole near the far end.

This thread is linked to from https://forum.shopsmith.com/viewtopic.php?t=11373

Although the safety grip is identical of other models(excepting the current sliding workpiece clamp), I am including it here.

After removing the single screw at the bottom of the grip that secures it to the miter bar, and the post mounted at the pivot the following is separated from the miter gauge. The remaining two screws are removed and all three screws are placed in their relative positions. Each is a different length. The shortest is in the middle, and the longest is at the bottom.

[ATTACH]21506[/ATTACH]

This shows the different lengths.

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With the three screws removed, the grip halves separate. Not shown is the clamp screw with two thumb nuts that fits into the square slot in the right of the pix. The newer design is much less cumbersome.

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And the innards 'exploded' view.

[ATTACH]21509[/ATTACH]

The clamp actuator separates from the clamp holder just like the newer design.

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The lathe tool rest is included here although it is almost identical to current version.

The tool rest bar is retained by a single set screw.

FWIW that is a T25(torx) bit in the screwdriver. Works on 5/32 allen screws.

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Same for the arm to the post.

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Here you can see Mark VII differences. The tool bar and arm are shaped differently. The post has the circular grooves like the Mark 5 instead of the one sided rack gear on the current posts(this allows the post to swivel - opinions differ on the good/bad of that). The arm is short like the Mark 5/V 500 to match the carriage post location(closer to the spindle).

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The tail stock stop collars are removed.

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The off center cam is removed.

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It does not appear the PO did any off center turning.

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Well it would have been difficult since the 'cam' would not rotate freely. I initially thought paint buildup was causing it to bind, but after paint removal, it still wanted to bind. Closer examination revealed flash in the bore that was causing the binding. This is after I removed most of the flash. There is a seam(flash) in the middle of the entire tailstock.

[ATTACH]21517[/ATTACH]

The Mark VII tail stock is thinner(less material) and may be less solid.

For some reason an 'angular' look was preferred over the previous 'rounded' look of the Mark 5. This can be seen in both the tool rest and the tail stock. The headstock and tube end caps are similarly 'shaped'.