i HAVE A ZRT800 AND AM SETTING IT UP FOR THE ICE THIS WEEK. I AM RUNNING ABOUT 500 TO 600 FT. I RAN 23 /40 IN MY LAST SLED BUT RAN OUT ALITTLE BIT ON THE TOP END. I WAS THINKING OF JUST CHANGING THE TOP TO A 23. I'VE HEARD I WILL SEE A BIG DIFFERENCE AND STILL HAVE IT ON THE TOP END. BUT I WOULD LIKE TO KNOW IF I SHOULD CHANGE THE BOTTOM INSTEAD. PLEASE HELP. HAVE 24/40 IN SLED WRITE NOW AND I'M GOING TO CLUTCH IT TO THE NEW GEAR SET-UP.