The solder is fine. 0.032" is better, but I did electronics for years with just 0.064".
I guess you guys don't know how to use a calculator, or maybe you don't know how to convert between imperial and metric. Here's a hint, mm to inches is 25.4. If you can't remember, ask Google (like everything else)
0.064 inches in mm
Google responds with:
0.064 inches = 1.6256 millimeters
Google can convert between all kinds of things, including temperature (F and C), many different measurement units, currency, etc.