I don't have that particular holster, but I have a similar one, and I don't wear it IWB very much.
Something you might want to try is to slip it into the right front pocket of your tattered edge jeans (just like I wear
) and slip the clip over the edge of the pocket.
That keeps it up where you can get to it and it's more comfortable than wearing it inside your pants.
Plus, I find that it stays drier in hot weather because I don't normally sweat into my pockets.
I find that it conceals really well in the front jeans pocket under ANY loose fitting t-shirt or any shirt worn outside your pants, and again, it's really comfortable and easy to get to as well.
That's become my most common way of carrying the R9 except for those few times when I need or want to tuck in the shirt.
Then, I just change to IWB mode.