BLACKIJO DAGROSTIS failed to build on his chase debut promise when fourth behind the re-opposing Boom Boom over 17f here during the summer, but he meets that rival on significantly better terms now and, moreover, this step up in trip may help spark some improvement. Trapista is lurking on a dangerous mark and is feared most ahead of Boom Boom, but Songo has also come down the weights and could have a part to play on his second run over fences.