I was wondering if anyone has used the Panasonic EY7440LN2L 14.4v Li-ion cordless drill and the EY7540LN2L Li-ion cordless impact driver? I am looking into buying some new drills for our cabinet shop and have one vendor who is really pushing these. They would be used everyday in the construction of commercial casework. I want to make sure that they hold up and are built for commercial use. Any info from users would be helpful. Thanks.