Why I have love-hate relationship with my delta printer…
I printed most of a set of Herculien parts before I realized I had done something stupid.
When changing delta radius to get the motion flat again I neglected to adjust the diagonal rod offset. The result is a set of 99% sized parts.
My bowden is not completely solid/tuned either as you can see by the poor restarts near the screw holes. Making the thinner under extruded appearance on the smallest parts.
*Time to order more filament…
A friend of mine runs http://atomicfilament.com and he makes high specification PLA and ABS (+/-.04mm) filaments.
I have tried a couple filament suppliers and this stuff is just solid.
I used to be protopardigm believer, now I know atomic is the bomb 
Different colors print at the same temps or very very close. Strong layer bonding when printing at the right temps, beautiful colors
*sorry for the sales pitch but I love this guys stuff
http://imgur.com/jbJU27U