yeah its definitely a bit of a push. Another weird thing though is I set the memory too low and so it defaulted to 512, and yet primo still ran? If I don't try and set it and just leave it at 512 from boot it won't run. I didn't test it beyond just seeing if it would run though.
But set at 188 it seems to run ok, but not surprisingly doesn't like trying to calculate any routes aver 250 miles. Have to wait and see about stability as odds are it wont be any better than what you found.
Thanks Jon