I recently posted and received a Solution from @edsahergom around a snapping issue I was having in a modified definition. Cabinets Webinar - Snap Adjusted Boxes
I have found a new error I cannot seem to fix… While the snapping works (for the most part), When I add multiple parts and attempt to select one to change its length, the first part / unit is always selected. See gif below:

Link to App: ShapeDiver App Builder
Link to Model: https://www.shapediver.com/app/m/NEn5yDV5F7Wl9TPPdru7VhUA73k9wz
GH File:
ACL_04.gh (265.0 KB)