[stewbrash]

My method to do the valves seems to work without a hitch. After you feel confident you are on TDC after the intake stroke, get your feeler gauge under the tappet...snug down the square 4mm adjustment nipple with your fingers...then, after you put the closed-end wrench on the locking-nut...grab the square 4mm nipple with a small pair of needle-nosed vice-grips...fine-tune the tappet with the feeler gauge and pliers...lock down the nut...voila! Then release the vice-grips, rotate the engine 2 times (counter-clockwise), check with feeler gauge again...should be perfect.