|take a look at my old set up. i put jump bars on, then cut up board sliders to fill the space between bar and plate, thus creating a solid foundation, then i put another layer of slider over the jump bar.
if you have something solid between plate and jump bar, the bar will not bend your king pins
if your having a problem with the king pin sticking out too far with grinding, try cuting up some PVC pipeing and making coopers for your trucks, this will give you added clearance, so your king pin should not get in the way.
i just got solid plate stalls at the vert ramp at VANS. will be trying drop-ins soon.
you really inspired me