It's a flashlight, not an instant access, high-speed draw needed weapon. Muscle memory is less than key. IMHO.
No desire to flame or argue, but I've wrestled and continue to wrestle with this. EDITED TO ADD - but I am interested in a thoughtful discussion of the WHY for flashlight carry location which was the motivation behind the original post.
In order to continue my development in Pistolcraft, I started regular practice with a hand held light last spring (mostly during daylight because I didn't have access to a low light range). I focused on low-ready exercises to become familiar with the holds (practiced both Harries and Rogers, still do). Emphasis was on getting good hits (threw in some reloads also).
This winter, the Defensive Pistol crew at the club has been able to get together for some group sessions at our Indoor Range with low-light stages being a regular part of the menu. We've done some low-ready starts, some flashlight in weak hand (or non-dominant hand if you prefer) draws, and some hands at side draws of both light and carry piece together.
It led me to thinking about where I stow my light, the circumstances of when I may need it for carry, and whether "fumble access" is good enough. I say "fumble access" without malice because I found that was what I was doing when I attempted to draw both. I moved my light from behind the mag' pouches weak side to front of center line. There is no requirement to conceal a light, or a cell phone, or pager...many folks in my area carry all of the above because it gets dark early, and a light can be very handy. "Stuff" on the belt does not equate to CCW disclosure in my region.
I've found that with practice, moving the light forward on belt on weak side...I'm getting fairly decent draw times and good hits using a Rogers hold. Do I think this is a substitute for situational awareness? Absolutely not. Do I like the idea of being able to develop my skills so that a threat in the dark can be confronted sights on and verified in very short order (e.g. especially when returning home from a range session)? Absolutely I do...and I continue to work hard at honing that capability.
YMMV
Stay safe,
CZ52'