Dec 6, 2022:
Hello dedicated MR2 Supercharged community!
To answer the question I receive all the time; YES! I continue to build GruntBoxes even after so many years. Sometimes I run out of parts or PCBs and will go out of stock for a short time. But while the orders continue to trickle in, I expect to keep building them. For such a rare model, I am continually amazed that there is still interest in the GB.
I've combined my scattered side projects including the GruntBox, to my main (and much more functional!) Robtune website. The new GruntBox product page is here:
Robtune GruntBox Product Page
Enjoy!