Thanks for the links Marc. Funny they want $10 for shipping to Canada. Evolv shipped my USB charger for $1 and vape Dojo sent me a DNA40 board and Ni200 for $7.
Are you guys using silicone o-rings or another type?
Thanks for all the help!
Yep, they rape you with freight whenever they get the chance. It's not like they could just put it in an envelope and toss a couple stamps on it. For what it's worth they hit us up for $5 in the states. It may be worth buying enough to cover some of your other toppers while you are making the purchase, the freight I believe stays the same. I picked up all the sizes for my rta's.
I use the Buna-N 70's with good success. I believe that what most use and they work well.