I've been printing on glass quite a bit and it would be nice to be able to use a raft just under the support material going from the build plate. Is there a way to do that now that I've missed? If not I think this would be a great feature to add.
Version 4.0 added the ability to print raft base layers, which will create solid layers at the very bottom of your support structures. You can also add a brim to hold these solid layers down even more, or add a raft below that if you need even more adhesion. This has made a big difference in the success of the support structures for some of the tall prints that we have done, so thanks for the great suggestion!