Yes, more castor angle. I assume that you meant to say "angle the spindles" rather than "angle the sprockets" which doesn't really make sense.
Sorry, I had consumed some alcoholic beverages that night... But yes, i meant to say spindles. But to me it looks like castor angle and KPI does the same thing, its just the way you rotate the spindle bracket. I think I will probably do KPI as it looks a bit easier. I am going to look for some pre built spindles online that have the stub axles already welded on at an angle. I dont want to do it myself as I need it to be very precise for the speed I want it to do.
As far as the engine, I just need to save up some more money. Like I said, I shall resume production soon....