V3 is a major up-grade to the V2 with many more features.
The V2 was basically a slightly simplified version of a Maiden D and a Page DS in one box. The new Juggler V3 is based on the same Dumble ODS inspired circuit with two 12ax7s, however it has all of the features of the Maiden V2 and Page DS, as well as some other useful features. 

Kingsley

Demo by  Ed Pettersen

Demo by  Palen Music Center

Product Page

Juggler V3

The Kingsley Constable is a tube guitar preamplifier modeled after the classic "plexi" design of the late 1960's. It is designed to push a power amplifier directly but may also be used into the effects return of a guitar amplifier effects loop. While the most authentic plexi tones are achieved by using one of the above methods, the Constable also features a mode of operation that attenuates its output to allow it to be run into the front end of a guitar amplifier or in front of other guitar effects pedals, for a clean boost or mild to medium drive pedal.

The Kingsley Constable uses two 12ax7 tubes running at high voltage (around 270VDC) to get the most authentic valve tone out of its hand wired circuit.

Demo by  Craig Paddock

Demo by Fan&Music

Review by reddit /guitarpedals

Review by The Gear Page

Review by the Fretboard

Constable V2

The Harlot V3 is a hand-wired tube overdrive pedal using a single 12ax7 tube running at high voltage and a JFET transistor that is used to push the 12ax7 into overdrive. It covers mild, smooth tones through mid gain crunch to fairly aggressive rock tones. A second footswitch takes the Harlot into a higher gain mode which is great for increasing saturation and aggression for solo tones. The Harlot sounds natural, fat, dynamic and is very touch sensitive.

Demo by Andrew Cheng - Guitarist

Demo by Ricky A

Review by reddit /PedalDemos

Harlot V3

The Jester now ships in a new smaller (version B) enclosure

The audio circuitry and components are all just the same as before, as is the sound. However, the new Jester uses a different power supply design, which has enabled this smaller footprint. The two Tungsol re-issue 12ax7s are now housed completely inside the pedal and still run at high voltage (around 250VDC).

Demo by Sam Goffen Guitar

Demo by mr amp

Review by delicious audio

Jester V2 /B

The Bard’s bias modulating tube circuit provides classic, warm sine wave tremolo tones. The single Tungsol 12ax7 runs at high voltage for a full, rich and dynamic tube sound. The 9VDC power supply (provided) is converted to both 6.3VDC for the tube heaters and 275VDC for the tube plates.