I agree dump the tubeget a different style peep like the G5 Meta peep, you also might be able to take off the leeches and still have aquiet bow(that tubing isloud). Any way the Switchback that I shot was super quiet with nothing on the string but a loop and a peep. Youhave a possibility of picking up over 10fps if you do this.

Your XT may not be the fastest bow in the stablebut it is still a great piece of equipment.