Mandingo - Looks awesome!
Based on your comments about the Uchida red pen, I did a test this morning. Thanks for the heads up.
What I see is a shade of red that is more to the blue side of red versus the Elmer's pen which leans more to the orange side of red.
From the few stitches I did on the back of my passenger seat, I like the way it looks. I had to make two passes to get the color rich enough, but I like the shade of red; it's a bit understated.
Now I do like the shade of the Elmers pen, it definitely pops. Once I get the interior done, I'll decide whether I want to redo it with the Elmers, or I might just go over it with an orange Uchida pen.
Sorry, I don't think you can really capture the shades of these colors with a camera, you really need to see it in person and decide.
BTW - it's UNBELIEVABLY easy to do this guys; just takes a little patience. The dye literally just soaks into the threads. Like all the DIY's say, just wipe the leather every few stitches.