Yes you can. I had to replace my 30 cxi with a pcb. I called glow worm to check and the new part number is the 2000 one. Apparently it's part of a kit now hence the change of part number.
To confirm my manual stated using the 4000 part number and I replaced it with the 2000 part number. £155+VAT
Cheers
Scott
Scott walker, December 2010