Chi Sau is the most important part of the system. Chi Sau is not a form of kata. Chi Sau is not a form of sparring. Chi Sau is the bridge between techniques from the forms and real fighting. The forms are always the same. Chi Sau is free development. Every session is different.
Storm door installation will cost $200 to $400. It will take a professional half a day to a full day to install a storm door. The length of time it will take depends on the complexity of the installation. If the installation is straightforward then it will take less time, and therefore, cost less.
Typical costs: 1  A plain front entry door starts at about $50-$250, depending on size and materials, or $200-$700 with installation.  Sliding glass doors (one fixed panel, one sliding; sometimes called gliding or bypass doors) start at about $300-$800 for a basic 5'-6' wide set, or $600-$2,000 with installation.