Humm, thanks for the reply John. That is good idea, so basically grind up some HSS perhaps just short of 45deg and use that as a single point cutting tool in the flycutter. Then use the dovetail to finish the job after the bulk of the material has been removed by the flycutter.
I could possibly have damaged my dovetail cutter but it seems fine enough, still as sharp as before and no noticable damage. I didn`t use it for very long, only a minute before I realised I was rushing and decided to leave while I found some more info. Will have to see if I have spoilt it but I guess not....
I`ll give the flycutter method a go and I guess the cutter shape would be just less than 45deg to allow the finish to be put on with the dovetail cutter.
Thanks for the suggestion. I`ll let you know how I get on tomorrow.
Darren - I really wanted to use my shaper for the dovetails but I`m still having issues. I`ve smashed a piece of the pully trying to remove it from the shaft - it has all siezed up and I think I hit it a bit hard

. Now I need to drill a hole for some brackets and then mount it but it is getting around to doing it. If I`m being honest, it is the only bit of kit that isn`t here at my house, it is at my grandparents as I don`t have any room for it here (it won`t fit in the cellar), consequently I don`t get much time to work on it, or at least I have to make more of an effort. I hope to have it running in the next few weeks, although I said that a month ago!
Chris