Tried your suggestion and got a new error, seems like it should work though. My layout is below as well.
Also tried with another contatenation model that first put " " around each Tech string before it got put together with commas. This threw a similar error except it said "user lacks privelage or item not found" and it cited the first tech in the list, I think it was taking the quotes as part of the literal in that case. Thanks again.
For best results, use the Firefox browser..