Here's my method for mouth watering Chuckie
1.) Rub with S&P add some garlic and onion powder to taste
2.) Smoke at 275* over wood of choice until the IT is 160*
3.) Put the roast in a pan and fill with beef broth, rough cut bell peppers and onions. As a gage you want the bottom third of the chuckie in the mixture
4.) Cover with foil and put back on the smoker, or in the oven at 250*275* until it is falling apart.
5.) Remove from cooker and shred to discard all of the fat
6.) Put back in cooker to reduce the juices by 1/2
7.) Mix it all up real good
Try this it may get you closer to what you want.
2000 Weber Simpsons OTG
2010 22.5 WSM
Smokin' Bucky UDS
Early 70's Red Weber Statesman
1995 Red Weber Master Touch
2010 Brick Red Touch n' Go Performer