You know, you’re right. 250 million years is the accepted value and I know this.
I don’t know why or how I ended up in the Cambrian Era. I think I had planned to go through a couple of revolutions of the galaxy, which would have given me a stop in the Cambrian and after another revolution a return during the Triassic-era.
Likely I got distracted by too many things to do and not enough time to do them in. I will revise it and add our Triassic-era dino-cousins at my first opportunity… Thanks for reminding me.