Back to your bent wire: did you do that yourself? Is it easy to do?
It does open up all kinds of possibilities. I'm thinking 1C and 2C mostly. Their "non filter tray" versions are easy to find at good prices. And it is such a pity if these beautiful enlargers fade away, just because they don't support multigrade printing.
To be honest I am not one very much in favor of getting expensive color/split etc heads. I prefer to keep these enlargers in their original condition. No offence meant btw, I am sure people get beautiful results with the various modern enlarger heads.