4 words:

paul adjustable track ends.

even if you don't have tools and have to take the bike to a shop for something, the mechanics will be so in awe of the practicality of the beautiful built-in tensioner, that they're guaranteed to get the wheel centered and tensioned perfectly.

i have 'em on my jackson and the one time it was touched by an LBS mechanic, the tensioners were fondled with the utmost of call-you-in-the-morning respect and adoration and i got the bike back with the wheel just where i'd left it when i'd initially handed it off.