use the heisenburg, either set the first operator to a square wave, or the first 2 operators to circle waves, not sine, but circle, get rid of any decay or release, then put a tube with the default preset, and optionally if you want you can put a lowpass slope with the frequency turned up slightly higher than the default preset to make it sound like a normal 808 lol, if you want more distortion, you can mess with low tune, high power exiters, or you can maybe use crusher with the bitrate turned down pretty low, 808s are really simple, just a low tuned square wave usually :T
im just trying to figure out how to slide a sampled 808