they send you a whole bunch of material and also a booklet of free pizza coupons to give out as well. really nice design and would definitely recommend! if you are not sure about a specific situation, especially the ones that touch on the electrical and the core of the system, please involve a professional. use these dates as a time to learn something new (pottery class anyone?) they can only guess by the surrounding context (i.e. they get enough information so that they can make decisions that are in their best interests. 