MSD 6al-2 vs Digital-6 Plus

I have a digital 6 plus. I’ve had it new on the shelf for 10 years. Then 2 years ago I get to finally use it. All seemed good but the tach signal didn’t work. I sent it to MSD for them to fix it. Cost was 40$ plus return shipping. I haven’t used it yet. Car is off to paint. My reply is worthless