Plymouth won the Conference Trophy following a keenly contested final against Boston at the Norfolk Arena on Sunday evening.
The Devils went 60-31 down on the night, but took the trophy 94-88 on aggregate following their 63-28 win over Boston in the first leg at the St Boniface Arena on June 6.
Number one Mark Simmonds led the way for Plymouth with 11 points from his five rides and was well supported by Kyle Hughes, who produced the trophy-winning ride in heat 14.
Hughes was the only Plymouth race winner, but his victory over Darren Mallett and Adam Lowe saw the Devils hold on to a 10-point overall lead with only one race remaining.
Boston:
Simon Lambert 14+1 (5 rides), Darren Rolph 6+1 (4), Joe Haines 15 (5), Darren Mallet 5+1 (4), Darcy Ward 9 (4). Res: Adam Lowe 5+1 (4), Oliver Rayson 6+2 (4).
Plymouth:
Mark Simmonds 11 (5 rides), David Gough 3+1 (4), Tom Brown 5+1 (5), Kyle Hughes 8+1 (5), Seemond Stephens 2 (4). Res: Jamie White-Williams 0 (4), Richard Andrews 2 (3).