"Tune" is a word bow shops use to charge money.
What traditional shops charge for advice on tuning a traditional bow? There are tons of discussions on it, and a large section of a website devoted to it--
www.bowmaker.net .
Tuning is something any informed archer wants to do. A tuned bow is a better shooting bow. Better performance, quieter, better penetration, less hand shock, better consistency.
Most tuning costs very little if anything. Adjust your brace height. Adjust your silencer placement. Use a serving that fits your nocks properly, or vice-versa.
I once saw a fellow posting about not being able to get pass-through's on whitetail deer, suppossedly shoot 80# bows. If he was telling the truth, then it's obvious he didn't have a clue about tuning. You might not get a pass-through with a poorly tuned 80# bow, but a well-tuned 40# bow will slide on through like a hot knife through butter.
"Fast Flight" isn't anywhere near the first major improvement in bowstring material. Do you use stinging nettle fiber for your string? Sinew? Squirrel hide? If not, then you must be "into" those new-fangled products.