Email Joseph Audio and find out what it costs to have the new crossovers shipped so you can upgrade them yourself. Jeff will want the old crossovers back.
I did this with a pair of RM25si, upgrading to the Mk.II crossovers. It was a worthwhile upgrade.
Cheers,
Graham
"Blue meters, big watts. This must be Heaven!"
Thorens TD126 Mk.III/Ortofon Super OM40, McIntosh MCD205, MDA700, C45, MC252, Joseph Audio RM33si Mk.II