New Grower Jet47 can be topped.

[hedgeraider]

You can bend her head around as well, it's gentler than topping and has same result.

nirvana sky at 60 days:

 

[hank]

I did top a pineapple express and got over 5 zips.
I have an idea of why on it works on some but not most autos.
We will see if I can build a case, a later time, before I say much more.