"In my mind he needed 12 months off and when I say off, that means off from doing any serious work," he said.
"The way we handle tendons now is actually to front-load a fair bit of work at the beginning of the healing process to try and encourage it to heal the right way and make sure the fibres align properly and it doesn't heal in a tight knot.
"Then we give them time off once the healing process is well underway.
"At that point you can give them three months off, or five months or six months, and I feel that we had probably one crack at giving him a full recovery.
"Every step we've taken we've probably added another week onto the usual return to racing conditioning and I wanted to give him three trials because we're likely to start off over 2000 metres."
Kingofwallstreet reappeared in a 1000m jumpout at Camperdown on April 23, finishing 3-1/2 lengths fifth, before a 2-1/2-length fourth over the same trip at Ararat on May 12.
He rounded out preparations for his return with a more searching workout over 1200m at Horsham on May 28, when he finished strongly to be beaten a head by Pacific Jewel.
"His last trial was very good visually and although the horse that beat him is a benchmark 58 horse, he's a sprinter and he had the advantage on us in the early stages and I really liked the way my boy was finishing off," Cumani said.
Given the nature of Kingofwallstreet's injury, Cumani is not committed to path beyond his first-up run but hopes the work he has done with him will ensure he can have a productive career for seasons to come.
"I'm trying to not get too excited and have low expectations," Cumani said.
"I hope that he can just be a horse that, first of all, gets back to the races for us, which is the most important thing.
"If he can, then perhaps he's a nice winter stayer and, you never know, he could go on and maybe be even better than that."
The 2000m benchmark 100 shapes as a highlight of Saturday's Flemington card with Riverina Cups King Bianco Vilano, promising import Zahrann, Brayden Star, winter regular Bold Soul and Shockletz among Kingofwallstreet's potential rivals.