Jim, when I got my 504 Mk4, I just removed the analyser unit from the Enlarger Chassis
I steeled myself, took two brave pills and attacked it with a pair of Wire Cutters and an Allen Key
I was really concerned about doing it before the dirty dead but have never looked back
I bought myself an RH Designs StopClock Pro Enlarger Timer together with the Control Lead which RH Designs make to go with the DeVere and two years on think it was money very well spent.
I only do B&W so the loss of the colour analyser wasn't a big deal to me
I have used Odyssey for a number of bits for my Mk4 and have always found them to be both friendly and helpful