This is still pickling me ... I'm sure there was somthing else ...
You know when you get that nagging feeling that you cant remember somthing ...
I'll remember, tell you about it and when you have forked out the cash you can have a go!
They also do a nice variable ND filter which goes up to 8 stops - not tried that personally, but it looks neat as you only need the one filter with you.
I already have Cokin P ND2/4/8. But I think for those super dark ND filter, it makes sense to get threaded ones since you don't want light leaking in from the holder gaps .
(this thread now has multiple contributions happening concurrently, the responses are a bit out of order )
Chris, your eBay link poses an interesting option. I will have to consider it carefully and assess whether a variable ND filter would work with my other existing accessories.