Charlie Macneal cruised into the fourth round with a 5 & 4 win over Robert McIntyre ((Glencruitten) and now lines up in the last 32 on Thursday morning against Ewan Ferguson (Bearsden)
In the final tie of the fourth round, James Bunch will face Scotland internationalist Allyn Dick (Kingsknowe) after a 2 & 1 win over Steven Stewart (Clydebank & District) in round 3.
Allyn Dick ended the hopes of Craig Telfer (Prestwick St Cuthbert) with a 2 & 1 win in their third round tie.
The other Ayrshire player in the third round, Paul Moultrie (Royal Troon), was edged out at the first extra hole by Ryan Lumsden (Royal Wimbledon)
All the fourth and fifth round ties are due to be completed on Thursday.