Howard Roll wrote:Any used Vinten 20 is ... unserviceable.
Although the O'Connor 515 heads have an excellent reputation, this is also an issue with them. Perhaps Iain Bason, who says above that he has a 515S, can comment. NovaCam, which runs an independent repair operation, says that O'Connor no longer has parts for the 515 heads. NovaCam machines its own parts, which I don't imagine are cheap, to carry out repairs. As mentioned above, it also says that fixing a problem with the fluid seal is uneconomic.
If I was prepared to deal with the additional weight of a 515 over, for example, a Miller or Cartoni, I would happily consider one if the vendor is a weekend filmmaker who bought his 515 new. Otherwise, I'd want to do a fair amount of due diligence before handing over my money.
Personally, I decided to go with a Miller CX6 in part because it's a current product and Miller has a service and repair facility, staffed by people who actually answer the phone and respond to e-mails, where I live. Both times that I've ordered accessories, I've received them in the mail the following day. They also dissuaded me from purchasing an accessory that would have cost US$300, and steered me to an alternative that cost $60. Finally, they've made it fairly clear that if I run into a real problem, they have units that they can lend me.
For North Americans, it's worth considering that Miller's warehouse, sales and service operation is just outside New York, and that Cartoni has a distributor and repair operation in Los Angeles.