I have also now done a few string jobs for friends. They all seem to like the results and one even said it was better than the last one they got from a pro at their home club.
I am not charging anything, because it is still a learning experience for me.
I now have all of my playing Biomimetic 100s strung up at 30#. One each of the following ... all syn-gut, all poly, poly mains & syn-gut crosses, syn-gut mains and poly crosses.
I like them all, but am partial to the all syn-gut. The all poly seems a little stiff, even at the low tension. I need some more play time with the hybrids, but they seem very promising.
Evil doers ... you face The Tick!