Derriaghy move clear in Section One
Derriaghy won the battle with fellow table-toppers Donacloney Mill, who are now joined by Cregagh, Saintfield and Cliftonville Academy, all sharing second spot.
The table now has a distinct top-bottom split and while this round of games leaves Derriaghy unbeaten, Ballymena remain winless at the bottom.
Donacloney Mill must have been hopeful of toppling their hosts when they bowed Derriaghy out for just 104 at Queensway. Jordan Wade top scored for the 'aghy with 25, Robin Sinton with an excellent 3-19 for the visitors, 2 wickets each for Andrew Bingham and Mark Campbell.
Jordan Wade followed up his efforts with the bat to claim 3-15 in a Man of the Match performance that lifted his side four points clear at the top of the table.
Saintfield missed the chance to share top spot going down to a 7 wicket loss at home to Bangor. The home side were held to 95/9, with three wickets for Chris Pyper and two each for Taj Onyekwelu and James Patterson.
Mark English (44) and Adam McCusker (35*) ensured the Seasiders went home with the points sealing the seven wicket win with more than two overs to spare.
Templepatrick lost the chance to add to their solitary victory when they lost by 26 runs to Cliftonville Academy, failing to chase down 114. Max Burton responsible for 30 of those runs while for Templepatrick only Michael Stewart was the only bowler to manage more than a single wicket.
Johnny Terrrett showed them how it is done, the last-arm spinner taking 4-13 and with Niall Greenlees claiming 2-9, Templepatrick were held to 88/8 in their 20 overs, Ross Bryans' 37 the only significant contribution.
Muckamore registered their first win of the campaign at Ballymena for whom James Kennedy, back in home colours, scored 40 out of their total of 128/5.
Sam Gordon with 44 and Luke Allen 22* saw Muckamore home by 4 wickets with two balls to spare.
Ballymena have been 'raising their Glasses' it seems - with Sam, Michael and could that be Michael Senior sharing the 6 Muckamore wickets with 2 each!
Cregagh brought home the points from their visit to The Mall, a 33 run win with Arron Johnston (49), Mark Johnston (31) the main contributors to a total of 148/7 while Matthew Wright and Michael Hoey claimed two wickets each for the hosts.
Armagh came up 33 runs short as they ran out of overs at 115/8, Jamie Rogers with exactly 50 of those as Adam Beattie claimed 2-31 in the win that sees Cregagh move in to second spot in the table albeit on NRR.
So after four rounds of games a split is developing in the table with the top five two wins clear of the rest of the sides.
Derriaghy (4) beat Donacloney Mill (0) by 18 runs
Queensway, 29 May.
Derriaghy 104 (19.5 overs, J Wade 25, R Sinton 3-19, M Campbell 2-14, A Bingham 2-15)
Donacloney Mill 86-5 (20.0 overs, J Wade 3-15)
Cliftonville Academy (4) beat Templepatrick (0) by 26 runs
Mallusk, 29 May.
Cliftonville Academy 114-6 (20.0 overs, M Burton 30, M Stewart 2-25)
Templepatrick 88-8 (20.0 overs, R Bryans 37, J Terrett 4-13, N Greenlees 2-9)
Ballymena (0) lost to Muckamore (4) by 4 wickets
Eaton Park, 29 May.
Ballymena 128-5 (20.0 overs, J Kennedy 40)
Muckamore 132-6 (19.4 overs, Sam Gordon 44, Sam Glass 2-20, MG Glass 2-22, Michael Glass 2-32)
Saintfield (0) lost to Bangor (4) by 7 wickets
Demense, 29 May.
Saintfield 95-9 (20.0 overs, M Hamill 30, C Pyper 3-21, T Onyekwelu 2-11, J Patterson 2-23)
Bangor 96-3 (17.3 overs, M English 44, A McCusker 35*)
Armagh (0) lost to Cregagh (4) by 33 runs
The Mall, 29 May.
Cregagh 148-7 (20.0 overs, A Johnston 49, M Johnston 31, M Wright 2-15, M Hoey 2-33)
Armagh 115-8 (20.0 overs, J Rogers 50, A Beattie 2-31)