I've got a McNaught hand grease gun with the flexy shaft and it works fine.
The only problem I have is tightening the end of the grease gun around the nipple when I have grease all over my hands :(:D
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BTW, the standard length Landy Fender nipples are longer than a standard nipple. If anyone has ever fitted standard length ones due to the OE ones falling out you won't get a fitting on them as it will foul the cross/cups.
You could find yourself a Landy with smaller nipples, but really I think you should be attracted to her for her personality.
Or you could take to your grease gun with a file.
Bastard.:D
Cheers
Simon