has anyone tried to put 5inch elbows on the end of a 61meter to take out some of the boom bounce? i heard it works. i have also heard that it pushes the liner of the 4.6 pipe into the 5 inch elbow so i am not sure if i should try it.

I WOULD NOT .

put a weld bead  on the connecter end and grind it flat to hold the liner in posistion.

hi there i run a 63 and know what you mean about boom bounce.... i heard that putz are looking at a 119mm pipe to replace te 114mm that are on at the min...also have  you to tried to pump just that little bit quicker it`s seems to level the bounce out a bit..

i'm with the cat, give her more stick, she'll flatten out.

for whatever reason the higher the volume the smoother it is. also instead of reducing stick with the 4.5 hose. that helps a little too. try full throttle and play with the volume until you get it where you like it when she's stretched. also i find that once you get the fourth section tucked under far enough,if you start a-framing that helps too.