1) Most people own or use 1" drivers vs 2". Anyone using Pi speakers could most likely use the horn too.
2) 2" compression drivers are very expensive to buy if you don't already own a pair
3) I already have a 2" version of the horns

Colin, do you have a preference for front-loading or back-loading the work for this group build?

Front-loading would have the group pool some money together to design and built some tools to make the individual builds easier. Examples of tools include pre-fab vanes, cutout and router template, pre-fab throat adaptors.

Back-loading is if we do minimal upfront and let the individual builders build from scratch.

Gar.