Chonied my Y25 today at 313 and then 312 all original limbs and string. Changed string and got 320fps. Then changed bow limbs and now is shooting 368fps which I think is a more worthy speed for the bow.
Beautiful crossbow. I've always liked wood over composite but to each his own. The Y25's stock is what got me looking for a wood stock of my own. The only reason I don't own a Y25 is they are "hand specific". I'm left handed and my son is right handed so he will eventually end up with my hunting items so I look out for him, too. You can check out my ambidextrous stock on the thread about the Vixomag Frankenbow.
I'm also curious about the limbs. I did add speed to my Exomag by swapping out the older flat cast riser for the newer angled riser but I sure didn't gain that much out of it.
I believe Danny Miller of Horizontal Archery in Sardis OH. still has some of the 50 left handers made left, give him a call 740-483-2312. He may have a way to also send a right handed stock with the bow... I know he has both.