I fitted this tone circuit, to my Ibanez, Mikro, short scale bass.
Pros: It was easy to fit, just a bit of soldering. The battery fitted snugly in the control cavity. The transformation was instant, with total control over, bass and treble, overall volume, and pickup balance.
Cons: The only negative would be for anyone who can't solder, as there are a few connections to be made.
The bass was Ok in its original state, but didn't have a lot of choice, in the tone department. The Artec Se-2 circuit gives all the control you need.