Well, this one gets into the Birmingham Jazz book of records for biggest band ever - nearly 40 of them in all, including full string section. It also drew a full house who lowered the usual average age considerably.
Good, strong ensemble playing, some lovely, expansive, cinematic writing and passionate soloing from main man Chris Bowden were the repeating pleasures during the evening.
There were also some one-off highlights, including tenor saxophonist Tom Challenger's first solo, carefully constructed from some pretty abstract building blocks, and Lizzy Parks's superbly assured vocal on the none-too-easy Bowden composition Crockers and Killers.
Conductor and composer Jules Buckley was a charming front man, and the Heritage Orchestra's usual vocalist Natalie Williams added to the feelgood factor.
The Heritage Orchestra is clearly hopping the genres and there is some unexpected awkwardness as a result.
A national newspaper last week ran an article on the bleak life of your average orchestral musician. Perhaps the Heritage string players were reflecting upon it as they sat tense and edgy, yet strangely uninvolved, through much of the evening.
In fact, Bowden and Challenger aside, there was a stiff-backed music school tension about the place thoroughly at odds with the louche West Coast "cinema noir" flavour of Buckley's and Bowden's music. Perhaps more rehearsal will result in a band as relaxed as their audience.