I have just released "MNGA Test 2" for testing all 18 holes. I would like feedback more than anything else on the difficulty. This version is meant for tournament play, with Sunday pins. I would like the course to play as difficult as possible, but while still staying true to the course. At the end of the day, Augusta may just be too vulnerable to video game golf, so there is only so much you can do to make it hard.
With that said, my last 2 test rounds were E and +1, so it's not a pushover. I do plan on making a version for a more casual round of golf later on, so if you find the course too hard, do not despair.
A last note... I hit the planting limit on the 18th hole. I was able to rearrange some things to make the 18th presentable, but for the long time I will need to continue rearranging things in order to make everything look as accurate as possible. So for now, still consider this a work in progress and a little ways away from a final release.