I have an aspire cleto, which also has an extender tank, making it about 5 ml, I believe. Sorry, I don't use it much, it was my son's but he used it like crazy and the coils had great life for him (he went through at least 250 ml of juice a month). It's topfill and a nice vape, I just don't like DL much at all. But, that tank is leakproof, you could shove it in your boot while climbing Everest and be just fine. It's easygoing too, easy to fill, fairly easy to change a coil, and from what I've seen of it, consistent. I think aspire has come out with an updated version but as far as I'm concerned, it's an excellent DL tank. I vaped it at about 30--40 watts, my kid vaped it in the 60--90 range, I think.
In fact, if you want it, you are welcome to it. PM me. I highly doubt I will ever be using it, and I gave it a shot. I don't want anything for it, but I'd like you to have a tank to try if you'd like that. I have a few coils, too, I think, if I can figure out where I put them?
Up to you
Anna