Thanks all,
yes, there will be always a certain percentage of risk in a repaired tyre, no matter what system used, no doubt.
A new tyre, mounted by a professional with some common sense, would be the best choice, if you can afford it.
My recent experience with shops and so called "skilled mechanics" have a little bit shadowed my trust in them.
For me, I speak only for me, there is no more reliable "mechanic" available than I am. I know exactely what I when and how did. Because I'm fond of documenting most of steps I do in such cases.
No workshop, and I as a customer, could afford to fool around three hours (10 min coffee break) until a by me balanced wheel is turning at "zero", for example. Consists of balancing, air out, turning the tyre on the rim until the lightest point is found, rebalancing......