The family of the tragic Lauren Scott says her death is the result of a "careless disregard of the simplest security measures".
Lauren was just 20 years old when she was killed by agricultural machinery at Springfield Farm in Dawlish.
The land belonged to 45-year-old Neil Carpenter, convicted of gross negligence for manslaughter.
After the judgment in Exeter Crown Court, Ben Scott, Lauren's brother, said that Carpenter had spent £ 75 on a plastic sleeve for a PTO that killed her.
He said, "While no judgment can ever bring back our sister, my family has put our trust in the criminal justice system today.
"Today, over a year and eight months after Lauren's death, we can finally grieve, sure that her death was not caused by her own fault, but by a careless disregard of the simplest health and safety measures.
"As highlighted several times during the process, the presence of £ 75 PTO coverage would have made Lauren still with us today."
Lauren suffered a deadly involvement with the 540 rpm PTO, which connected Carpenter's tractor with an ancient milling machine used to injure barley against livestock.
The case highlighted the dangers of working with machines in the workplace and the widespread use of volunteers in agriculture.
Lauren was alone on the farm with Carpenter at the time she died. She helped him regularly without being paid because she loved working with animals.
His report was that she used the dangerous machines without his permission. But a video taken half an hour ago clearly showed it in the tractor's cab and a running engine.
The prosecution said his approach to health and safety was "cavalier."
Mr. Scott said in the statement that workers and volunteers like Lauren "can expect no less than the highest appreciation for your well-being".
He added that Carpenter's actions deprived the family of a loving daughter and sister who should have led a "long and prosperous life".
"Lauren, although you will not be able to share the future with your family, your mind and memory are with us daily and will be forever more," said Mr. Scott.
In a personal statement of the victim read in court, Lauren's mother and her sisters talked about her deep sense of loss for her "beautiful" lover.
Her sister Kelly said she has no words to describe the tremendous impact on her. It got worse because her death was caused by "carelessness of another person".
Sister Victoria Scott added that she could not accept Lauren's death. She said her sister "gave everything to others without expecting anything in return".
"Lauren was just pure gold," she added.
Carpenter, who has admitted two breaches of health and safety, but has denied criminal responsibility for Lauren's death, is convicted on Tuesday for all three crimes.
Det Insp Steve Davies of the Major Crime Investigation Team said Carpenter tried to shirk the responsibility by lying to the police, which he was doing at the time Lauren was killed.
He told the jury that he was in the stable at the time, and found Lauren dead when he heard a bang in the field.
DI Davies said the decisive proof was taken by Lauren himself. While filming pigs, she detained Carpenter in the tractor cabin for a few seconds, which he had refused. More footage captures audio from a starter motor of a tractor.
"In the end he distanced himself from any responsibility for Lauren's death.
"We managed to retrieve a video from Lauren that was made just 28 minutes before the actual incident itself – by luck, in the background was a two-second snippet of the tractor when we could stop it and if that was not enough, experts Blow it out Put someone in the actual tractor that powered the mill – the logical explanation was that Lauren shows it on video. "