These photos aren't the best, but what I could get quickly. One additional thing....This unit, old as it is, has steel bushings for the pin and carbide cutter holes. Even this dated the unit has no play whatsoever in the pin guides and if it ever did they could be pressed out and replaced. Notice the offset on the guide pin. When it is placed in the guide and rotated to where the detent falls into the body of the device the pin lines up exactly where the cutter should be cutting so if you leave the unit somewhat loose on the bar and insert the guide pin and allow it to enter a cutting tooth it will automatically give you the correct height for bar mounting and put you exactly where the cutter will be cutting. It's a simple thing to add to the Timberline....aside from making the correct offset pins the detent in the body can milled in moments.
Also... I didn't show a photo of the cutter, but it is exactly like the Timberline.....or rather the Timberline is exactly like the GAMN and the one that came with this unit is virtually unused. For a unit that is 30 years old it is in remarkably good shape with no play or sloppiness in anything on the unit!
The only drawbacks to the unit from the Timberline that I can see is that you are restricted to the 30 degree cut and the chain stop does not have a micrometer adjustment. You slide it to the correct position and then lock it down with another thumbscrew. Once set it's fine, but the micrometer adjustment does allow for a fine increment of increasing your cut if needed. This hasn't been a problem for me, but it's not as precise to make minute adjustments.
Notice the offset of the pin end and it is the exact diameter of the cutter
This shows the detent in the pin's head aligning it to the correct cutting height
This shows the detent in the unit's body. When the pin is in the detent and also in the cutting tooth of the chain the unit is at the correct height and the stop for the chain can also be set.
This shows the other pin and cutter guide. Also you can see the steel insert ( I believe it is stainless steel) which after 30 years still has no slop or play to it at all. If need be though it could easily be pressed out and a new one installed.
This shows the alignment pin installed with the detent on the head in place.
Sorry about the appearance of the unit, but it just arrived today and I haven't put it in the ultrasonic cleaner or even brushed it off yet..... For $20 you can't beat it though....the entire unit for less than the cost of the cutter! I'd love to own a Timberline, but I like a couple of the features of this one better and also couldn't justify paying that much for one when I'd only be using it several times a year!