A comment on the inlay:

These were done with a router, and clamped straight edges: I have a set of straight edges which clamp; and while I have not used them often, they were just-the-ticket for this application.

I guess there are hundreds of techniques for inlay work: and I marvel with disbelief on crazy ability some craftsman have. For the way I do them, there is a trick – the inlay groove is slightly wider than the router bit that I’m using; say, the router bit is 1/4”, and I’ll make the inlay groove 5/16” or 3/8”. In this manner, I can route a groove, then take a clean cut on the edges with an additional, or 2, passes: I don’t route the full depth on the first pass; so the additional passes both cut a clean edge and complete the depth – in this case, 1/4”. This approach allows for the inevitable entry hole being a bit too large, due to the router jerking a bit on initial entry. However, you need to be precise in setting and adjusting the straight edges: the desktop rectangle is dead square, so I measured an inset from the edge for both the inside and outside of the inlay path (then double-checked that the inlay path width was equal everywhere. Also, before routing layout the full inlay path, I double checked the router cut line by placing the stopped router directly over the starting & ending points – the bit has to be exactly where you want it to be – I often fashion a stop-block at the end, to ensure my momentum doesn’t over-cut the path. Preparation and layout are the keys: be patient: measure twice, cut once. For the corners, you need to chisel the edges.

For the inlay, itself, I always 45 degree miter the corners, rather than butt-joint them; and, if you need a length greater than your inlay piece, under and over miter the pieces (much as you would baseboard), so that no gap exists along the run. I make the inlay by using a jointed edge, then ripping a 16th to 1/8” heavy; then use a drum sander (or just sandpaper held along a long straight board) to fine-tune the width. This takes time to do, but it works for me.

For those who can do these with ease (much practice, I’m sure), you can probably just cut the groove on a single path, then use a drum sander to fine-tune the inlay width.

If I can provide any additional detail, please let me know.
MJCD