Unlike the 2015 final, Weir didn't get on the pitch at Loftus Versfeld - a late yellow card for Tom Jordan and frenetic last three minutes meant Weir and fellow replacements Oli Kebble and Euan Ferrie had to watch nervously from the touchline waiting for the final whistle.
"The three of us stripped and ready to go on but the ball didn't seem to go out," Weir said in The Scotsman.
"Then they did the [TMO] review and Tom got a yellow card and that was my hopes done, unless they were going to rejig the pack!
"Obviously, the icing on the cake is getting on but I understand how much graft has gone into this season to get us to where we are so there was no sadness at the full-time whistle as you could probably tell from the social media posts."
Earlier in the season Weir said he saw similarities with the current squad and the 2015 group and he had time to reflect on both successes on the flight home from Johannesburg.
"It's pretty special. I was reflecting on it on the plane and the way the team did it this time around was a little bit more special given the route that we've taken and with the South African teams coming into the league, making it stronger.
"I'm immensely proud and I can't wait to get home, have a shower, see the kids and water it down with a couple more beers!
"I think it was around February-March time that I said I could feel that same squad energy, the same vibe around the place [as 2015].
"It was the manner in which we did it - going away to Thomond [for the semi-final against Munster] and then having 50,000 people against you [at Loftus] in a pretty hostile environment at altitude, with the short turnaround with the travel.
"All the little bits of the jigsaw were a funny shape and it looked as if they might struggle to fit into the perfect picture but we managed to squeeze it together.
"I thought the boys were outstanding. The physicality of that forward pack... and I thought the backs were outstanding as well. Josh McKay at the back, Sione Tuipulotu, all of them had great games. George Horne's game management at nine throughout the whole play-offs has been outstanding as well, and I'm just so happy that after all that effort we've come away at the right side of it."
Looking ahead, Weir now wants the Warriors to build on this success.
"Hopefully. We've won it twice now and we've got the foundations at the club to really push forward and go and achieve more, I believe. If we can get bigger attendances along to Glasgow rugby in general and with the vibe around the Warriors it's easier to do that with a successful team, and hopefully the win on Saturday boosts that.
"I know the club rugby scene is good at Glasgow at the moment and hopefully the west of Scotland can get behind us and we just keep growing from where we are already reaching at the moment."