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That hole looks quite big but then my render will probably blow out anyway if drilling from inside so may not need opening out
I suppose the shorter way of me to say the above would have been 90 degrees is fine if your radius is large enough.
As for blowout, if you can get a mate to push a plank against the exterior while you're drilling that night help. Either that or go outside in...it's easier to repair an internal wall than external. Most people just accept the external blowout and use a blowout cover to hide it tbh.
Stonehedge-
I suppose the shorter way of me to say the above would have been 90 degrees is fine if your radius is large enough.
Yeah it was inferred 👍 in fact I just remembered one of the rj45 sockets in my skirting is going unused, might just drill from behind that and from there can patch to the spot I need it. Should provide a pretty straight run from where it's coming from as it won't have to cross the path plus the render's already knackered there!
Polygon
Not quite sure I understand the difference, but the former I think: horizontally through the wall then down to the ground externally. So entry point is higher than the vertical section, making a drip loop redundant no?
Edit: saw your picture. It'll be coming from below (outside) in to the wall from where it's crossed a path so no trouble.
That hole looks quite big but then my render will probably blow out anyway if drilling from inside so may not need opening out.