Complex sentence: Lawrence mainly builds handcrafted bass guitars with a delivery time close to a year with 20 to 25 built each year, but he has also built guitars for James Hetfield, guitarist and vocalist of the American band Metallica.
Split into simpler sentences: Lawrence mainly builds handcrafted bass guitars with a delivery time close to a year and 20 to 25 built each year. But he has also built guitars for James Hetfield guitarist and vocalist of the American band Metallica.