I got the purity fixed!!
I hooked in a modern degausser circuit that solved the problem.
When I wrapped the coil around the inside of the tube, and degaussed it, the impurity and convergence got all wacked out.
I just turned the purity magnet, it returned to normal!! im thinking that pure spot wasnt pure at all. it was magnatized, and the purity ring made that magnatized spot look normal.
But its all better now
now, i have to do a total reconvergence.