Congratulations on the new arrival! Looking forward to pictures. There's a group of FALers in Oregon that get together every summer out by Prineville. I love my FAL -- just wish I could afford to shoot it more often :^) --errrr, wish I had time to go shooting! My next major purchase is going to be a good scope and mount for it.
I have had one for several years, wouldn't part with it for the world. It also helps when you have a Brit as a buddy that can supply you with original accessories.
It looks like it would be a little awkward to shoot. You will have to reach over the top of your head to hold the grip. But mag changes should be fast with the mag on top like that.
I just got another kit in for a build. I got a STG58 and an Enterprise L1A1 already, think I'm gonna do the new one on a receiver that I mill myself.