Ebersohn is a useful player with pace and verve; his pass put Charles over and his match was full of examples of making space for his team-mates and interventions on defence.
Coltman, on the other hand, had a horror, subbed after 51 minutes. Just before halftime, the Force - doing nothing special but just stringing the passes together, saw excellent No 8 Ben McCalman clatter through Coltman's weak tackle to score. The Highlanders had previously gained the lead with second five-eighth Shaun Treeby scoring off a pinpoint Aaron Smith grubber.
That was the story of the match - the Highlanders would graft their way into the lead and then it would go all to hell when the Force forced their way into the Highlanders' 22 to score, thanks to defensive lapses.
They tightened things in the second half and grafted some more. Only to stutter again. A break-out from defence was thwarted by a rattling Nick Cummins tackle on centre Malakai Fekitoa. The ball came loose, Sopoaga's clearing kick was charged down, sticking in Junior Rasolea's midriff as the midfielder charged to the line. At 31-16 it looked all over, even with 20 minutes to go, but the hosts clawed their way back again with a try to Fekitoa and more good goalkicking from Sopoaga.
The Force scrambled, losing McCalman and replacement forward Adam Coleman to yellow cards - down to 13 men against a determined opposition for whom replacement Hayden Parker finally slipped over for the try but then couldn't kick the conversion from the sideline.
The Highlanders will play better than this. The Force, former whipping boys, are showing signs of holding the whip.
Highlanders 29 (S. Treeby, M. Fekitoa, H. Parker tries; L. Sopoaga con, 4 pens), Force 31 (N. Charles, S. Ebersohn, B. McCalman, J. Rasolea tries; Ebersohn pen, 4 cons). Halftime: 16-21.