if you seem to be needing to true your wheels it might be worth getting a wheel building kit that you can use to true your wheels, might be worth learning to do, maybe. then again its not really expensive to get the lbs to do it for you, but if you have some spare time and a little cash .....

this one helps adjust trueness/ roundness to 0.2mm

http://www.wiggle.co.uk/product_list...goryName=Tools

And check out the Minoura Wheel Building kits, there is a cheaper one and a more expensive one.

Hope this helps