"As id like to get my strings made locally id need some advice from you:
The bow is a 63#30" Thunderchild;
How many strands should i have?
D 97 or what other material?"
Depends on the material. I haven't tried Dynaflight '10 yet, so I'd go with either Dynaflight '97 or Formula 8125; 10-14 strands in the string, 16-18 in the loops.
"I understand the loops and the serving needs to be cushioned with aditional strands, correct?"
Yes
"Or should i skip the skinny complete and use a conventional 18 strand string after all with this bow?"
18 strands is overkill with most any material, but the only way to know what works best for you and your bow is to experiment.
Chad