Ignition box tests

have had 4 of them never a failure ,except for the first one I bought used , hooked it up wrong , sent it back to msd in texas, they charged me $19.00 and sent it bqack to me !
That must have been years and years ago
My buddys brother may have been the repair man
He has been there over 25 years and handles repairs and worked in dyno room before they were removed by latest owners.