The center pin used to be threaded at the top and wouldn't just pull out if tugged on. Imeo?
Yeah i took a look online and found this but unfortunately they don't ship to canada and the specs say 4 mm OD so not sure those are them. The other places i found were for big orders only as they don't even give price just ask for quantity i need then send for price estimate. Looking at Rob's site tonight to see what else i can buy to offset the shipping. Anyone know a coupon code for VaporKings?