I was skimming NR and besides the fact that some people already have implemented designs i was thinking about
![#2gunfire](images/smilies/new_2gunsfiring_v1.gif)
...
I was looking at calculations.... if i have a heater or whatever lying around the house and the price is less than 15 does that qualify as free? or is it only stuff that makes life easier like thermometers/random diy pieces around the house ect. ?