My advice comes from what I have done when we get into a situation we haven't seen before. I call the controll manufactior and ask for references of like jobs. I then call and talk to the construction super. The adjuster and maintenance mechanic. And I have never been turned down by the way. Seems like elevator men love to talk elevators????? Just ask my wife!!! We run about 16 mod construction crews but have never had a job of that speed. But a few minutes and a couple of calls can save you hours no weeks of grief and $$$$$$ of money.