Felix Cartegena's original bubble machine plan was published in Kite Lines Volume 12 Number 3, 1997. A plan can also be found on the web here: http://users.erols.com/ramirault/page0008.html

Kite Studio manufactures the central hub that holds the bubble wands.

All hubs are now made with 12 holes for 12 wands. Some plans call for a 6 hole hub, if that is the requirement for your machine, then skip every other hole.

Bubble wands are not included.