You can definitely top autos. @Dutchman1990 does quadlining with his which is essentially topping once above the 4th node, and then stripping nodes one and two. He's has great success with many auto strains and has a couple of journals showing his technique.I’m really interested that you topped one of the autos. I have a bunch of auto seeds ands that’s what I’ll be growing for a while... so I’m tempted to top one or two. But some people say never do that.