I make PWM mods, specialize in them actually, though I'm not an authorized vendor on these forums so I don't want to accidentally break any rules by brokering a sale by advertising that, more of a statement in this case opposed to an advertisement. I could walk you through making your own, but also plenty of people make them. They just take.. forever, and cost far too much.
I put the Voltrove on a 3S PWM two months ago and ever since I found the Hammond 1590N1 CNC Alpinetech Enclosure which is perfectly sized for both a big 4S lipo and to seat 40mm shit without hangover, I haven't looked back. The HoG is great but I have to agree with Manny, it lacks enough power. 95% of retail mods lack the power to properly vape the Voltrove. A 41mm tank DEMANDS big ass coils, and big ass coils DEMAND power. If you can't push at least 320W+, the Voltrove isn't being properly used in my opinion. No 40mm+ device is.
With big business, big pharma, big tobacco, the MSM and the FDA absolutely fisting vaping into the dirt, modder boards are unfortunately the only future vaping might have. Boards like the Big Al IntelliPWM and Ant PWM boards are great for this. Takes various types of batteries, in configurations from 2S to 6S. Any power range from low voltage tootle puffing to uber vaping in the thousands of watts. CNC boxes and PWM modding boards just might be our saving grace, and it could be worse as I find PWM vaping to be superior to all other types currently available as you have a virtually unlimited power range for vaping of ANY kind.
The IntelliPWM board also has locking features, on/off, output/input voltage display switching, favorite settings.. virtually everything but temp control which is honestly a shit gimmick. Then the NLPWM by Voltrove, adjusts in .1 increments and has a very DNA feel. Takes up to a 6S circuit. RMS voltage, which vapes like damned near DC.
Nothing China is putting out compares to the IntelliPWM or the NLPWM. Then you have the Ant PWM, which takes up to I believe a 5S and has a maximum power of around 1,100W. It's not much bigger than a 1K potentiometer. Again, China just can't compare. Take one of these amazing boards, put it in a 1590N1 or something similar, and you have the perfect mod for a Voltrove 41mm or pretty much anything else.
With perfect CNC cut and wooden art style boxes (stab wood, etc.), with powder coating and hydro dipping for paint jobs, laser engravings. Parts to fit every custom style and subjective taste. With amazing boards like the IntelliPWM, NLPWM, Ant PWM, Gunstar PWM and Micro PWM V2. Or even a DNA board, or an SX550. With amazing battery choices like lipos and 20700's. Magnetic doors or sliding doors. LED switches, raised switches, flush switches. Choose your colors, pick ANY. For ANY part. Want bezels? Have some fucking bezels. A pot to adjust through any power range to suit you with any battery circuit from 2S to 6S to pick from. With all of this to choose from, why would you pay the same price or MORE for some shit in a plastic case China puts out that can't do half the shit these custom mods can? I honestly don't know, but I do know I've stopped buying retail China mods for good.