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Seems to me like it's half of one and six dozen of another. I reamed my kingpins 6 years and 14000 miles ago. They're still just as tight as when I first did it. You just have to have a good reamer and use it properly and you won't have any problem. Adjustable reamers are iffy at best. Worn reamers are better but still leave a lot to be desired. Odd number fluted reamers can leave an odd number of highs and lows as can a reamer with an even number of flutes. Reamers are not designed to cut highs and lows. However when used improperly it can happen and does. A lot. If you want to do it your self learn how to do it right. If your going to do it in a machine, make sure the spindle bearings are good. Dial what your going to ream in to avoid trying to force the reamer and causing it to cut oversize or out of round. Use clean cutting oil. If you can find a spiral fluted reamer use it. If you have any doubts take it to a shop and get it honed. A loose front end flopping and wandering down the road is no fun at all (as you probably all ready know if your kingpins are worn). A reamer is designed to cut one size. The tolerance is built into the tool for the cutter grinder and if he does his job everything should work in your favor. Hones can be somewhat variable depending on the operator and his ability to hold tolerance. And I've seen them cut highs and lows too. Especially with a sunnen hone. They usually have a three "fluted" out of round condition that almost looks like an airplane propellor when checked on an air table with electronic indicator and graphing software. And the weird thing is this propellor effect can't be found with normal gaging such as bore or air gages. So to check for out of round you need an air table with the electronic indicator and that won't give size it only gives roundness. So then you still need to use a bore or air gage. (Thank God for computers) So the bottom line is "You make the choice". You can't go wrong unless you really don't have any idea what your doing and if that's the case you better take it to a shop and let them decide what the best way is. Good luck.