A train

I'm having same problems with my 2011 cxu model. Need help also

I recently installed a 2 piece clutch brake on my 2011 cxu 613 with eaton fuller trans. I adjusted the clutch to a 1/2 gap from the throw bearing to the clutch brake. Now I have too much free play in the pedal. I noticed that now when I drive and shift gears my rpm's drop fast and instead of floating the gears I have to double clutch in order not to grind the gears. I have read that you should not adjust the linkage unless really necessary. I am just curious will this free play cause my rpm's to drop quickly when shifting? Is the clutch grabbing causing the rpms to drop so fast?