One of the few custom machine parts on the Jubilee is the twist-lock mechanism. Without a machine shop, I can't modify the design at all, and thus am stuck with the original Jubilee carriage design.

I've 3d printed a design that fits within the envelope of the original machined twist-lock. If this design isn't sturdy enough, I'll try reinforcing it off-the-shelf metal screws. It's possible I can also make the twist lock a little longer. The Jubilee tool specification doesn't seem to specify a keep-out region for the twist-lock.