Well, it's been a long time since my last update, but progress is ongoing. I've cleaned up all of the electronics and enclosed them in a case. So far, the Shoe Goo has worked very well to increase the friction, and it hasn't peeled off of the ABS, which was one of my major concerns. As a note, I did prep the ABS with acetone immediately before applying the Shoe Goo, which may have increased adhesion. At this point, the primary goal of making a powered add-on for the wheelchair is basically met. But, when I look at my daughter's ability to use this, I see I need to take it farther. The chair really needs to be able to autonomously drive to specified locations. I need to configure this so she can pick a destination in the house using her eye gaze system, and the chair will take her there. More to come soon...