EDIT: A few people have commented about Martin being shorter. Well...in Cabin Pressure it's implied that Martin is a bit short (both Douglas and the Cremona actress comment on it) So, since it's a radio play, it can be taken as true regardless of Benedict's actual height. Hence, I tend to draw Martin shorter.
So a few people have asked about this on Tumblr, so maybe I'll leave a note in the captions. In Cabin Pressure, Martin implies that he's not very tall, and since it's a radio program that can be true no matter who plays him, because obviously Benedict isn't short in the least. So I draw Martin shorter than Sherlock, is all
This is adorable, and I approve of the idea so hard! Martin being the youngest of the Holmes brothers (or at least a half-brother) is one of my favourite Cabinlock headcanons. And indeed, nothing wrong with two Benedicts, nothing at all! 8D