Hogan's attempt at a long-range breakaway faltered on the day's main ascent - the field finally reeling him in halfway up the Goat Valley climb.
It was at the same point a lap later that Scrimshaw successfully launched his winning bid - getting an unexpected gap at the top of the climb and making the most of it, despite having almost half a lap and another decent hill to contend with. Behind him, the field splintered under pressure and by the time a chase was organised, Scrimshaw was gone.
Powering up the Western Line climb, Scrimshaw extended his lead, and by the finish was clear by a convincing margin. Visitor Peter Wilkinson just held off Gareth Wright in the sprint for second - Wright's third placing his best in road racing to date. Forrest and Luff were in the photo for fourth and fifth - finishing in that order, and crediting Wanganui with four of the top five placings. Scrimshaw's win was a tribute to the efficiency of his training - the busy GP having to juggle his cycling with work and family commitments.
Although they lined up with the A-graders in the premiere event - the race for the John Bull Cup over 88km (4 laps) of the course - the B-grade field was soon in a race of its own for category honours. With the main contenders for overall victory, including eventual winner Nick Lovegrove and his Subway Pro-Cycling teammate Sam Horgan (third place) off up the road, some interesting battles developed behind them.
Wanganui's Duncan Appleton got away with a companion on lap three, but lacking in long racing miles on the road after the mountain bike season, he blew out on the final lap.
Further back, fellow club members Brent Bismark, Bevan Cheatley, Denay Cottam, Phil Groves and Adrian Petitt were comfortably sitting in the main bunch. Also there was local hard man Pat Johnstone - notably in a bunch that temporarily went clear when the peloton split after the third ascent of Western Line. Behind them, Wanganui's Richard Stanton was having a hard day at the office but still battled away gamely.
Unsurprisingly, there was real damage done on the last two climbs and at the line, Brent Bismark was first of the local men to appear - his eighth overall placing seeing him beat several of the A-grade riders home and securing him an excellent second spot in the B-grade field. Wanganui's Bevan Cheatley, Denay Cottam and Phil Groves claimed third, fourth and fifth respectively in the B-grade - all creditable efforts on a very tough day of racing.
Matt Goode, who has been riding in Wanganui regularly was sixth, just in front of Petitt, who toughed it out right to the line for seventh. Tenth place went to Johnstone.
Wanganui rider Lewis Bunker fronted up in the two-lap (44km) U17 race in what was his biggest test to date. Unable to stay with some of his more experienced rivals - who clocked up some very sharp lap times - Bunker turned in a great effort for fourth place. He will continue to improve with experience and natural strengthening and will have gained plenty of confidence.