Welding carriage with changeable wheel configuration and modular construction

A welding carriage comprising:

• a base,
• at least two wheels disposed at one end of the base;
• a first wheel assembly attachment member disposed on another end of the base;
• a second wheel assembly attachment member disposed on said another end of the base;
• a first wheel assembly removably engaged with the first wheel assembly attachment member, and when removably engaged with the first wheel assembly attachment member said first wheel assembly is securely coupled to said base;
• and
• a second wheel assembly removably engaged with the second wheel assembly attachment member, and when removably engaged with the second wheel assembly attachment member said second wheel assembly is securely coupled to said base,
• wherein said first wheel assembly can be oriented in at least two different positions with respect to said base,
• wherein said second wheel assembly can be oriented in at least two different positions with respect to said base, and
• wherein said first wheel assembly can be removably engaged with either of said first and second wheel assembly attachment members and said second wheel assembly can be removably engaged with either of said first and second wheel assembly attachment members.