NEVER use acid core solder on electrical components. The acid will stick around and continue to eat into components and wiring well after the soldering job is over. Resin core solder can be had in various quantities, but I buy the one pound roll for around $12-15 which will be a lifetime supply for most folks. I use Kester brand 44 Resin Core solder in the .031 diameter size. This is about the size of mechanical pencil lead and works quite well for what you will be doing.
Symptoms and diagnosis [edit]. Mittelschmerz is characterized by lower abdominal and pelvic pain that occurs roughly midway through a woman's menstrual cycle. The pain can appear suddenly and usually subsides within hours, although it may sometimes last two or three days. In some cases it can last up to the following cycle.
Ovulation generally occurs about midway between menstrual cycles; hence the term mittelschmerz, which comes from the German words for middle and pain. The pain of ovulation can range from a mild twinge to severe discomfort and usually lasts from minutes to hours. It is generally felt on one side of the abdomen or pelvis and may vary each month, depending on which ovary is releasing the egg during that cycle.