Thanks very much for your prompt and very useful advice.
I will investigate further as advised and let you know how I'm getting on
Don't forget- if you decide to go for grease nipples, it is also possible to get 'angled' ones, which make using the grease gun quite a bit easier
I hunted around for ages until I found a gun that did the job really well- ended up with an Abnox-Wahner which has been excellent
G
