So my VT Inbox v3 just arrived!
Unfortunately, this is the first versionof the Inbox that I've owned so I can't really do a comparison.
Feels very nice and works flawlessly out-of-the-box in VW mode. I don't have any immediate plans to load escribe and change settings, but my fire button LEDs light up fuschia - I'm not really digging it but I don't even see it whilst firing anyway.
The back panel is a snug fit. The front panel (with the squonk port) still has a bit of wobble. Nothing major, really, but it could fit better.
The silicone bottle is, indeed, removable. The spare bottle that came with the kit is NOT silicone but a darker, harder plastic. I'm sure I'll never use it.
The tubing is 2mm ID and 4mm OD.
The only other bottles that I have to use in comparison are sjmy bottles that I got on FastTech (2mm ID and 5mm OD). They will fit it the Inbox nicely but are a couple of mm taller.
IMO, this is the best of my devices between this, the Aleader Killer 80, the RSQ, and even the Therion BF 75C (I don't really need, or care for, the color screen). I do wish the buttons were a little "clickier" but that's just a personal preference.
As long as nothing weird pops up within the next week or so I'm definitely ordering another as backup.
There's just one thing I'm wishing for a the moment. That's a silicone ring/frame that would go around the side of the mod (but still leave the panels free to open). I won't hold my breath though...