Tri Tip Roast with Tomato Red BBQ Sauce

A tri tip roast is one of my faves!  I get them from a local butcher, the price is unbeatable and when you thinly slice it against the grain, it's tender and juicy and packed with flavour!
The tomato BBQ sauce is nice as well!  I've cooked these for many friends and it's always a hit!
It's on page 108 from Weber's Real Grilling Cookbook