Upgrade from Essential to Essential+

This upgrade adds the following features:

Atmosphere chamber regulator
• Increased packing density from 10% to 20%
• Increased build volume from 30 x 30 x 15 mm / 13,5 liter to 30 x 30 x 30 mm / 27 liter
• Unlimited recycling of powder
• Increased max printing speed from 10mm/h to 12 mm/h