whoops! i was thinking you where saying patrol instead of portal >_< but about that.. i don't think you can do that with engine changes, its be something like a bot with vehicle physics.... mounting a bot on a vehicle? or just do a invisible bot with a turret dts mounted on him?, but that'd take out the flipping over and stuff... you also could do a hackey method but still... we need to get the pros in here *calls ephi, trader, geek, bush and kirby*
p.s. also there called portal turrets, not bots, might want to change the topic title