I've used the Evolv and the Cisco and prefer the Evolv, that said I'm not concerned about the 3mm thickness The Cisco looks good on paper and that's why I purchased one, it seemed to tick all the boxes but the 'C' clip is the weak point imo. I found it frustratingly hard to install the clip with everything in situ, but that may have just been me. I damaged one trying to fit it, they seem way less robust and easily deformed than a circlip. luckily they do supply a spare. I was experiencing some resistance problems and found the second clip had popped out. I gave up trying to fit it and will be ordering the StealthVape one VB mentioned and maybe see if the wave spring from the Cisco fits. If the Cisco had a circlip, which I find are easy to fit with a decent pair of pliers, then the Cisco with it's versatile installation would be a great alternative to the Evolv