The 30-year-old Canadian was a popular member of the Steelers team under former head coach Paul Thompson during a two-year stint at the club that brought a play-off trophy win.
Along with most of his 2017-18 team-mates, he departed for pastures new in the summer, signing for Croatian team Medvescak Zagreb.
But, with the EBEL club running into financial problems, Armstrong has negotiated a return to South Yorkshire on an 18-month deal, hopefully in time to play in the second leg of the Challenge Cup quarter-final with Guildford Flames on Wednesday night.
Barrasso admitted he knew little about his new signing, but was confident - having seen his resume and having had talks with others who have played alongside and coached him - that Armstrong would fit in well to thline-up
As for the performance against the Blaze - who inflicted a first shutout of the season on the Steelers - the only positive for Barrasso was the performance of netminder Matt Climie, who turned away 31 of 32 shots on his net.
The only time he was beaten came late in the second period from the stick of Chris Joyaux, with the Blaze ensuring they went back home with both points through Thom Flodqvist’s empty net strike at 59.05.
Steelers had some clear chances of their own and thought they had levelled in the 57th minute, only for the goal to be wiped off when it was shown not to have crossed the line thanks to a stunning stick save from Coventry goalie Miroslav Kopriva.
"Our goalie played really well and gave us an opportunity to stay in the game," said a frustrated Barrasso afterwards. "But offensively we certainly didn’t take advantage of that.
"We really came off of our offensive game just from a putting pucks to the net perspective. It was a little bit perplexing because we talked about after the second period that we needed to get to the net more.
"And even when we had the goalie out we refused to shoot the puck, so I’m not sure where that came from but we’ve got to get it out of our game very quickly."