thank you!
not to look down at it because it's obviously experiential information and thus practical,
the issues i found when looking for frames and motors:
frames don't always state what motors they are drilled for. i was looking for 11xx, but a lot of the 130, 150mm frames i looked at were for 8.5mm, single hole on each arm. (then i had to do a new search to find out how easy carbon fiber is to drill holes in).
it would be useful tio know what mounting each motor type is.. eg. 11xx, 13xx are both 9mm spaced holes?? some sources say yes some say no. i gve up and bought a prefab because it did my head in.
i only brushed the surface of trying to find out what fcb/escs i needed to make the 11xx motors i liked go round.
course, i'm an odd case. i think, most people want to build quads that look like the ones the see on the telly, little compact things to race around. otoh, i wanted more of a lazy flyer.. 11xx motors on a super light frame that could easily be a half foot, or even a foot square.... i'm just mental like that.