The Kirkintilloch side kept on course to retain their trophy with a 1-0 success at home to Letham on Saturday in their seventh round match.
But Foster’s Central AFL table toppers Colville Park face a replay after being held 2-2 by Stenhousemuir Community at Dalziel Park.
Linlithgow Thistle, never previously beyond the fourth round, were also involved in a thriller which ended all square. drawing 3-3 with Denistoun Vale.
In other matches Drumchapel, Possil YM, Oban Saints and Shortlees booked their quarter-final places while Leven United and East Kilbride YM must play again after a 1-1 draw.
The replays are due to be played next Saturday.