Which telescope manufacturer first introduced 'modular packaging' that allowed customers to start with a basic system and add components over time without replacing the entire telescope?

The astronomy retail market has transformed dramatically in recent decades with innovative product packaging and marketing strategies. Major telescope manufacturers have found creative ways to differentiate their products and reach new audiences. This poll tests your knowledge about a significant packaging innovation that changed how amateur astronomers purchase high-end telescopes.

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Celestron with their 'NexStar Evolution' system in 2003
Meade with their 'ETX Modular Observatory' approach in 1999
Orion with their 'SkyQuest XT Plus' expandable platform in 2010
Celestron with their 'Advanced Series' modular design in 1996