Hi,
Ron from San Bruno, CA here. Just wanted to let everybody know that I am up to grooving again! Made all the new changes to my 95 Nissan today that Ron recently published. I made sure the groove was deep to the bit shaft, widened the spark plug gap from .043" to .049", plugged off my PCV and rerouted it to the air intake hose behind the mass air flow sensor as well as connecting the tank vapor hose to that tee also. Now there are no vacuum hoses connected to the manifold except the brake booster.
If anybody is in this area (San Francisco Bay area) we can talk or if you want me to do a mod on your car I am available.
Thanks,
Ron