From the article:
If you’ve seen the original IMSAI 8080, I hope you’ll agree that the toggle switches are a great match to the original colours. The case is now made of 3mm thick aluminium, powder coated blue and also a good match to the original.
Running the replica at unlimited speed I can get a simulated clock speed somewhere above 5 MHz, there is certainly no problem with reliably running the simulation at a realistic 2 MHz or 4 MHz making WordStar, SuperCalc2, M80/L80 a pleasure to use.