I've been so impressed with the the Gs3020-12 I put in my Art Hobby Ibis that I'm considering a ZS in my current project. For some time now I've putting together a Sr. Telemaster as a club towplane. I'm looking for about 2200-2400W on 10S swinging a 18" prop. I'm trying to decide between a ZS4045-12 and a Scorpion 5525-225. Other than a $30 price difference the specs look very close--within an once of weight, very close Kv's and power ratings.
I can safely recommend to get the ZS4045, absolutely fine and very very efficient motor.
I use the ZS4020 for a 12lb+ airplane with a very high wing loading (38oz/sqf) and it fly it with authority.
They also run very cool.
I do have the ZS4045 and ZS4025 also which is enough for a 6-7kg (~15lb) plane i think.
I don't remember either seeing a bolt on adapter in the boxes.