"Some days you might feel great and some days you won't. But, for me, it was pretty straightforward. I was always improving and there were no real blips, whereas some of the other guys coming back have been a lot more volatile with their symptoms."
The Chiefs know that all too well, with prop Ben Afeaki retiring earlier in the year after battling lingering symptoms and No8 Liam Squire ruled out for the rest of the season.
That meant the medical staff were particularly conservative with Symons' recovery, leaving him out of action even after he had passed the required protocols, and even after three other front-line locks had been felled by injury.
Looking on as his team turned to the retired Ross Filipo and development player Brian Alainu'uese, Symons admitted feeling an internal burden in the bid for full fitness, but that feeling was never exacerbated by those picking the side.
"I'd be lying if I said I wasn't [desperate to return]. But I guess it's a real testament to the coaches and the management that I still didn't feel any pressure to come back, even under those circumstances. And the guys did a great job filling in, [Ross] and Brian are still around and it's great to have them in the team."
That pair's involvement is decreasing as the Chiefs rebuild their ranks, with Brodie Retallick starting in the win over the Reds and fellow first-choice Symons enjoying half an hour off the bench.
The 25-year-old hopes to assume a starting spot on Saturday night and, after the Chiefs lost half their own lineouts in Brisbane, his elevation seems inevitable ahead of the playoffs. But Symons was much more focused on capping his time in New Zealand with a Super Rugby title before shifting to London Irish in the quest for an England jersey.
He was savouring his final weeks at the Chiefs and, after joining a haka at Monday's team awards dinner to farewell departing players, he will take with him some typically Kiwi memories.
"Being an Englishman, I never thought I'd be doing a haka," he laughed.