I've gotta say I just started using a Mills Tactical hybrid leather / kydex IWB style holster for a Sheild 9mm and it's almost like it isn't there. It melts into just about any clothing I'm wearing; jeans & T or slacks & a tucked in dress shirt. The leather was a bit stiff at first + it took some time to figure out the best position but now it's great.
Custom made Kydex works great for holsters & Brian Mills makes all of mine.
I am thinking of buying a Shield for IWB carry. I see you really like your hybrid holster. Do you think it is necessary for a gun like the Shield? My nephew and my brother carry either a Sig 938 or a Walther PPK and they carry in one of these:
They say they are comfortable and inexpensive. What are your thoughts? Have you tried a minimalist style like these?