A few things need developing, but that is all part of the testing process. For example, the baseplate has a super wedge on it that is comparable to a 12/15 degree angled riser. Whilst this might suit the LDP crowd, it might be too fast turning for a slalom truck where progression and rebound are at least as important as is a rapid change of direction. Too steep and the truck turns very quickly, but feels a little bit 'all or nothing;' 'on or off' if you will.
This pitching can, in extreme cases, lead to the skater stalling the truck and being hurled over the front of the board. It is far better to reduce the wedge angle a little, have a slower yet more progressive turn, with fine tuning coming from the rider's preference.
Don't forget that Virage offers fine tune risers in 3 and 5 degrees for this to be possible.
Given that the truck uses angles comparable to that of a Bennett or similar, the slalom truck might end by having a base plate angle closer to 8 or 9 degrees. We also have to check the ride height of the baseplate so that is is both as low as posssible whilst allowing wheel clearance at full turn angle.
And styling.
Winter fun!

Sam