Thanks to everyone for their replies.

I'd just like to clarify. Are you using split filter printing because you are printing with the ilford or Kodak filters and split filter allows you to get in between the grades of the filters?

When I start printing again it will be with a colour head so am I right in assuming that the issue of split filter printing is a moot point when using a colour head as any degree of contrast is available with a colour head.

Mark