I've had a Spin Doctor truing stand for a long time. $79 at performance now. The photo hides the center radial feeler.

I like the independent feeler probes. I twist and push in one side at a time, until the plastic tip touches the high spots on that side. I can hear when it's contacting the rim, and I work on the highest spots: locate the high spot, jog the wheel back and forth to localize it, then adjust the nearby spokes. There's often another, similar high spot farther around on the rim. Make just a small spoke adjustment, often even less than 1/8 turn, on a pair of spokes at a time, one from each side of the hub. Or it might be the pair on each side of a spoke near the top of the offset, usually turning the center one twice as much as the two offsetting side spokes.

Then pull that feeler away, and work on the other side's high spots. Repeat until done.

Turn the spoke wrench more than your target amount, then back partway, to limit spoke windup. On flat spokes, I cut off a $1 screwdriver handle, then slotted it with a fine hacksaw blade, to turn the spoke blade back to the plane of the wheel.

I can get a reasonable centering test from the centering piece. I usually use a couple of pieces of masking tape to line up with the edges of the rim. I'll carefully flip the wheel, and use a similar amount of force on the quick release, then compare if the rim matches the previous tape marks.