Hi Paul, I had mine in the primary for 1 year and bottled for 6 months. Only now starting to taste sour and balanced.
As above not much cherry flavour in mine but, many lambics are blends of old beers for sourness and young beer for fruit flavour. Timmermans I understand use fruit cordial.
I used the same bacteria and Brett cake with a Brown Ale, waiting to see if I get an Oud Bruin type beer. T