The main improvement is the modernized fuel and air injection system.

The main improvements included easier assembly, no soldering, and fewer parts.

A main improvement was a wider track of 1446 mm.

The main improvement was the addition of a V-shaped hull, increasing the protection offered.

The main improvement is a more powerful laser gun.

The main improvement over the XB-24 was improved aerodynamics, which led to better performance.

Its main improvement is the amount of new content included, graciously contributed by several community members.

The main improvement was the use of a dual gap head permitting write verify.

The main improvement was the addition of mirror lock-up.

The main improvement of the Bedrock design was in the frog, which holds the blade also known as an iron.