I appreciate the sound advice and reality check.
If those targets are too high and Calcium ppm's don't really matter above 50ppm, why create profiles with these high target levels? A guy like me with little understanding of water additions is going to try and nail the target as close as possible.
Also, my RA levels are negative and my alkalinity is only 1/3 of my target. I'm using RO water. Assuming I have my ion additions to within 5% as you recommend, how else can I increase my alkalinity without messing up these numbers?
Even better, how would you set the profile additions if brewing an IPA with RO water? If I have managed to get the gist of it, I'm not trying to be dead on the target numbers but rather look at the style of beer being brewed. In this case, an IPA with the sulfate levels be the focal point to smooth the bitterness of my hops. Am I "getting" it or am I way off base?
Once again, thanks for the advice and the hard work put into this tool!