I recommended that adapter in a thread back some time ago trying to help a member out, lo and behold, somebody else saw the post and got one and started using flat tops in his ProVari. One night after a few beers he accidentally inserted the battery wrong, and literally smoked the board in his trusty old ProVari.
I had assumed that folks reading it would understand and take precautions and use it safely, I felt pretty bad that info that I had offered fried a
mod that had sentimental value to its owner.