Mod for 41mm rda?

[man//childjr]

So I bought a steam crave Titan... Probably not the smartest I've done but I love this thing. However this giant has a ton of over hang. Was planning on getting a Titan pmw mod but it's apparently been discontinued and people that still have them want a fist full for the. I'm having the same issue wit the liasimo f4. The hammer of God is just too expensive for my blood. I was wonder what anyone is running their 40mm plus attys on? I'd really like to keep it under $100 but I'm afraid that's unrealistic at this point.