I'm looking at JM Custom Kydex AIWB holster for my G43. I'm currently carrying the gun in a Versacarry leather OWB holster at the 2 o'clock position. While this holster is the minimalist style I tend to favor and works pretty well, it's not molded to fit the gun as securely as a kydex would be.

Anyone have experience with the JM Custom AIWB set up?

JMCK is the only company I use. They make a fantastic product, and I LOVE their AIWB design. I've been carrying exclusively their AIWB for a couple of years now. Own one for my G19/32 EDC, my P229, and my P320. I dunno what your body size/shape is, but if you're a smaller guy take a look at the "George" AIWB. If you're normal/larger guy, the regular AIWB is perfect. There are variations of it (with a "wing/claw" designed to rotate/keep the pistol tucked in tighter to your gut), and I get them with the neoprene wedge, which does the same thing. G19/32 disappears with just a tshirt over top. I see you're in my home town (Ft. Worth, hell yeah).....given the heat I'd suggest getting the full guard. Give them a try, I think you'll like them.

Thanks for the info. Which belt loop style to you favor? I was thinking about the split loop as it seems the most secure, but then I think maybe the clip might be a better option.

I use the 1.75" clip. I had the split loops on one of my holsters (the P229) for a while, but found the clip to be very secure on my belts (I wear 1.75" leather) and it's more versatile as far as placement goes. So I switched all of my rigs to the clip.