Perhaps a longer rest.
At least over here, the steer are raised for at least 6 months and sometimes a year longer than grain-finished animals, so you see tri-tips that are a little larger. So yes, get Oxen tri-tip next time
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
"perhaps...but then again...maybe not..."