No! Keep the stock tanaka hop up! Just shim, etc. And align it, and it will work wonders. Don't forget to clean everything too.
Wolfgeorge is right, no KA bucking, go nine ball, if you must install the VSR kit.
I was using .3s, and getting a coat about 8/10 times at 105 meters with the stock tanaka cut. Was above field-legal, however, at about 630 fps/.2