Hi Art,
Like Craig said, you will be good, just reduce stack on other lams.
.020" may be a lot of weight if you don't, depending on bow design.
I read up on hard and soft maple, and it seems the best way to see if it is hard maple is weigh it. Hard maple , if memory serves well, is 40#+ per cubic foot. Thats hard to do with lams I'm sure....