I found this kit on Ebay (about 55), it contains a printed circuit cable the knobs, a plan and TBX. Assembly requires some knowledge in violin (you must dig beneath the pickguard, just the location of ct knobs about 7cmx4cm about 1 cm deep (height components)). Dfonseuse mandatory. Then the wiring requires patience. I adapted a system that plug out of the rear plate (the o there springs) to recharge the battery without any disassemble. Warning have noiseless pickups because the boost, the parasites are accentus Mount Product ... on a deluxe Mexican Start (Super Start) in swamp ash with two Gold Lace Sensor and Seymour Twang Bost acute. Systm trs interesting supplmentaires capabilities to make the instrument. Trs powerful Boost (+25 db was hard ...).
For the boost against 0, the output level is compared dj supprieur not a guitar team. The boost works on the ds mediums that one starts the Systm, so the TBX can be very useful for rquilibr the system. Then we vary the Boost 1 10, and this opens up an infinite palette of sounds ...
Exprience I would do with that choice, knowing that I have another layer team "Vintage"