When you cut longer pieces, miter saws are best used with supports on both sides. One way is to cut in a drop-down section into a bench for the saw. Another is to build up raised supports on both sides of the saw on top of the bench. An upright along the back of the supports will let you use a stop block for repetitive cuts.
Remember that extreme temperatures can build in an attic without proper ventilation, especially with a dark colored roof.
Most fires involving either masonry or prefabricated metal chimneys occur because of improper installation, use or maintenance. Here are a few of the most common causes: chimney installation too close to wood framing; thermal insulation too close to the chimney; and, passing the stovepipe or chimney through a ceiling or wall, causing ignition of wood framing. Also, always operate your appliance within the manufacturer's recommended temperature limits. Too low a temperature increases creosote buildup, and too high a temperature may eventually cause damage to the chimney and result in a fire.
Heavily harvested herb plants can look untidy. Consider interplanting herb beds with annual flowers to camouflage the trimmed plants.