I've always sort of stunk at flash technique. I did some casual shots of my granddaughter's first birthday yesterday using the rented G1X Mk III and its onboard flash (I don't have a flash for the X-T1). I had no trouble with focus, even in the very low indoor light, but my lighting was inconsistent. In some images, the background was fine, and in others, it got very dark. I tried using both Av and indoor portrait modes, but found setting everything manually worked better for me. Any thoughts on a decent flash for the X-T1, and better, a good primer on using it? For me, shooting waterfalls in a dimly lit canyon is much easier than shooting indoor people scenes.