Sun/moon midpoint is very important in synastry between two people,so you need to know yours. I've been doing all the math myself when I do charts....but now I found this! yay!
I have not. they used to have free compatibility reports(don't anymore)and I have done those,and loved them.just don't consider the houses when you don't know birth time. but they give such in depth info,it's very nice. you have to choose the placidus,and look closely at the ascendants to make sure they are not off due to daylight savings time. I still use their free life style planner now and then though,and it really is usually very accurate.
now that you know your mid points,this is one of my favorite tools....
I've been doing all the math myself when I do charts....but now I found this! yay!
http://www.noendpress.com/pvachier/midpoints/index.php