I saw a post somewhere saying it was a good idea to get your office up to level 3 and then hire 2 construction masters to reduce future construction times. I've got my office up to level 3 and have hired 2 staff members but it's only allowing me to make 1 of them a construction master. When I try and assign something to the 2nd one, construction master is not showing in the drop down list. Can someone advise please.