

Some of them are automatic, in that they use the deceleration from letting off the trigger to let out more string. So if you have one of those ones and are constantly turning it on and off in short spurts, it would eat up string pretty fast. Best to do a swath and only let off when you want more string or are completely done. The automatic ones tend to be more intended for heavy duty use, rather than single yard use.
Map data obtained and converted from other formats often ends up accidentally condensing labeling categories. One result is train tracks being categorized as generic roads instead of retaining their specific sub-heading. Another, unrelated to this, but common for people that play geo games is when forests and water areas end up being tagged as the wrong specific types.