I've always used thumb grips with the X100F (T,S,0) since it improves the grip tremendously. When I use the hotshoe however, the grip must be removed and once again I return to a hard to grip camera. When I was in Japan, I bought a sheet of camera leather tape in a hobby store. I didn't think much of it then but it became useful very quickly as I started using it on many parts of the camera.
One thing I miss very much from Leicas and other rangefinders lenses is the presence of the focusing tab. With a focusing tab, you can learn the focusing distance / position of a lens and get a feel for the distance and also making precise fine-tune possible with the slight move of a finger. There has been a few excellent commercial products made available, one of them being TAAB, and other various 3D printed solutions available, though in my opinion they all take away from the compactness of the X100 cameras. With the extra Sugru I had left over from dustproofing the viewfinder, I opted to make a focusing tab on the ring of the X100F.
Do you want your viewfinder looking like the picture above? This is what happens to my viewfinder on the X100T after nearly 2 years of normal usage. I don't think any of us wants to, except over time this WILL happen as somehow dust always finds is way into the X100 viewfinder. The X100F is not sealed, and there is no way to open the camera up yourself to clean out the viewfinder. Having owned all previous X100 versions, I have experienced this phenomenon happening to every single X100 I've had. Thankfully, there is an easy way to slow down the accumulation of dust over time (besides not using it).
I had a weekend long job in SF where I was traveling throughout the city and as well as along Highway 1 to capture photos. During the first night, I dropped my camera (d810), prism first, onto carpeted ground. It actually fell out of my bag.
It shot fine, but what I didn't know was that it killed something internally that I was unable to trigger anything flash related on the camera. That includes PC sync, hot shoe and built in flash. My extended trip plan was quickly cut short when I was called to fly back to LA for another shoot the next right after the end of the weekend job. Between flying red eye, prep, and shoot the next morning, I didn't figure out nor realize the fault with the camera body.