Dunhill lighter questions (Rollagas)
 

I recently purchased a nice vintage Dunhill Rollagas and It's on it's way here now. I realize I'll need flints for this and I figure I'll buy the Dunhill Butane as it isn't too pricey at all. I also hear the Rollagas needs an adapter so it's probably very convenient to use their butane. Anyways my questions....

How long do these flints last? At 9 per pack, is that like 6 months worth or what? Basically am I buying like 2-3 packs or should I look to buy like 8-10 packs.

Also has anyone ever dealt with The international vintage lighter exchange? I'm looking to place an order for the butane and flints from them once I know how much I'll need.