I can only speak from my experience with the R26 I purchased from Wyvern in early March 2019. The cable strands were becoming fuzzy looking early on. I purchased the 26 strictly as a hunting crossbow, not a daily shooter as I’ve done with numerous recurves. I frequently applied wax to the cable strands to minimize the fuzzy situation and kept hunting:- ) Timing of the cams gradually became so far off that at the end of hunting season (January 5) I just put the bow down until I could find enough nerve to switch them out for the new ones from Ravin. A few weeks later I decided to try the cable and string change using the Ravin press. I’m quite limited on the use of my right hand since suffering a stroke In November 2015. The new unserved cable end loops were already fuzzing up on me while struggling to get them installed. I finally gave up and decided the only way I was going forward was to find some decent after market cables and string. I read up on Archery Shack’s here on the forum, ordered a set and I’m here to tell you the difference is unbelievable. Absolutely no unserved end loop fuzzing plus rock solid cam timing as of today. Also, the string’s center serving is still like new after quite a bit of shooting. It’s too bad that quality level wasn’t on the Ravin when I purchased the crossbow.
On another note, the R26, even with the very marginal quality factory cables and string, was unbelievably consistently accurate using stock Ravin arrows. I don’t shoot using bench rests for practice or hunting. I’m shooting left handed without any use of my right hand or arm. The forearm of the 26 rests on my knee. I’ve owned lots of crossbows during the last 17 years and this little crossbow never ceases to amaze me from an accuracy standpoint. Its small size and light weight also fits me to a T. Too bad it did not come out of the box when new like it is now but better late than never