Congratulations on solving system grounding. I would add to Raul's praise of the Klyne. One year ago I purchased a 7PX2 that Mr. Klyne had just serviced. Not only quiet, but natural timbres. The adjustable high frequency contour is a wonderful feature for optimizing sound of MC cartridges without resorting to "overloading" (i.e. use of low impedance load to attenuate excessive HF energy.)
Happy listening,
Harvey