Actually I don’t think this will be very difficult in terms of adding the molecular beam epitaxy steps to the traveler. However, there is massive fab-wide risk

Actually I don’t think this will be very difficult in terms of adding the molecular beam epitaxy steps to the traveler. However, there is massive fab-wide risk from introducing III-V elements into the process, which can contaminate everything, so they may have to build an entirely new fab for this process. It’s been a while for me, so my understanding may be dated.