This 260.4 is very much a players stick and is quite pt57a like if you ask me. Which despite the feelings of many is not really the ideal stick for everyone, quite low powered and with a small sweet spot but with amazing feel. For those out there wanting the open pattern pt57a feeling, this 260.4 much too your disappointment I suspect is how it might play and yes, it is unstable and low powered but has awesome feel.
I'm pretty sure my 260.4 flexed at 59 but I'll check on Saturday morning, the IG RP is stiffer than that right? Will try and check that too.