Great to hear things are going in the right direction for you!
Just a word of warning...we had our 3 person shop, (me and my wife and a part time helper) grossing about 400k.
Things were awesome. Good mix of smaller sub 100 pc orders and a few 3500 plus and plenty in between those numbers.
We had one client that sold his business to an international corporation. This cut us out of the mix for all the work they brought us as they had there own printer already in place and under contract.
With one swift move from one client we lost 52% of our gross sales.
Lets just say that things were tough for a few years while we grew the business again.
When I read that you had 3 clients making up 80% of your sales I felt the same sick feeling that I had 6 years ago.
I hate to be a Debbie Downer but be cautious of any one client that provides a large percentage of your income. If you can lose one or two of them and still be viable then no worries.
BUT, if any or all of them move on to a different printer where will that leave you and your business?
Again, I am happy to hear things are going well.
Bill