I just received the flat carts last night and I wish my 510 was with out batts, other than that it`s useless for me.... It would only help for a hands free vaping but I need to use a hand to push the button...

I use the 901 whistle tip on both 901 and 510. That Joye whistle looks like it's two inches long!
Yeah, has anyone tried this?
Joye 510 FLAT Tip Blank Carts (Whistle Tip) - dietSMOKES.com
Looks like it would hold a ton of liquid! The 510 is a liquid hog, a longer cart with a straw mod would be heaven!
edit:I emailed dietSMOKES and they said they are standard size, not huge like the pics look. RATS!
Actually I prefer the hard whistle tip I have on my 510 over the soft rubbery one on my 801. I tend to chew on the soft one for some reason.
