Okay, so Paul Okami told me I HAVE to try out the StewMac True Channel Binding Router jig.
Up till now, I've been doing it Taylor style, with a modified bearing foot on my laminate trimmer.
Of course, I've seen this before, but I really didn't want to use a bearing (or buy the set) as I enjoy the bearing foot on the laminate trimmer for its infinite adjustments. Plus, this is a project in itself. I did take some of the dimensions for the parallelogram though.
Being the cheap ass that I am, I made my own, with leftover parts from my cab builds. And, I didn't have to buy a full set of bearings and the bit.
If it seems too simple, it is. Vertical motion is 3.5".
I bandsawed out the opening for the bearing foot depth.
Underneath the jig, yes, the spacer is made of 1/4" ply, rounded at the edges (no synthetic here). Good enough - it does what it should.
The carrier only fits a tenor (with 3 braces on the outside edge, and one very loose so I can clamp a small piece to "tighten" the body). The piece in the center I place under the back, when doing the top.
Cost? 4 bolts, 4 nuts, and 8 nylon washers - everything else was scrap. Okay, maybe some staples and screws, big deal. Let's just call it about $5.
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This is one of those "what took you so long" things, like getting a Foredom or Knew Concepts saw - you don't know what you're missing until you have it.