Hi Tom
I have no idea what Clarke are like for after sales service,but if you have been looking at their machines in machine mart, i think they are a bit expensive. The one you mentioned is, i think known as a seig X1, and is sold by just about all the traders mentioned on this site, all of them are known to give fairly good after sales service. I have a X1 bought from Axminster tools many years ago, and for small jobs it has been fine. I know nothing about golf, so i have no idea what material you would be using, but if it will be brass or ally you should have no problems. With steel ,things could take quite a while, as you would have to take very light cuts. There are many more guys on here that are much more knowledgeable than me, who will no doubt give you better advise, but please shop around, as you will also need to spend about half as much again on tooling.
Cheers Derek