Ok, need some help. Ordered an ehpro Kayfun Lite Plus and now need something to put it on. I've been using an MVP 2 and iTaste VV3. I want a tube to match the Kayfun. I'm pretty open to suggestions. Ideally I'd like something the length can be changed, I absolutely do not want a big "lightsaber". Something short I can put a small battery in and can be lengthened of a larger battery would be very nice. Whether electronic or mechanical I'm open but seriously need my hand help on what to buy, including the proper batteries. I would like to stay under $100 (not including batteries and charger) with cheaper being better but will spend what I need not to have issues. Something available stateside would be preferable but fastech is an option if need be. With the Kayfun I'm planning around 1.25Ω to 1.5Ω if that makes a difference.