I wouldn't be either using yellow spring front and rear!
For the record, I run either Red or Gold springs on the 'old' German-made Seismics, heavily negatively wedged (-17*) at the rear. The new, Chinese Seismics and myself have not yet made friends in Slalom related endeavours. Could be the new springs, the resonance of the metal/metal hanger/baseplate, or the lack of grip at the less-than 8mm axles (nope, didn't get to run Geezer-X's 8mm axles for very long, so I'm still not sure if the 'new' Seismics have as much traction potential).
Whatever, I'd be looking at gettin' some 8mm axles on an Rts, or using something like an Airflow at the rear.
The only other 'critique' comment is maybe widen/reshape where the back foot is with those decks.
Otherwise, you've got a nice looking board in terms of concave, construction, and general contours! They look NICE!
![:-D](./images/smilies/icon_biggrin.gif)