If there ever was any doubt that there is a gulf between the Premier League and Section 1 today was the day that the evidence was on show for all to see.
Only Holywood who had humbled Muckamore in the previous round came near to upsetting the odds but in the end losing at home to visitors Instonians.
Instonians had totalled 242/8 with Robert McKinley scoring a hard hitting late order 59* to carry the visitors from 114/4 in 26 when Andrew White fell for 21. Ron de Freitas with 3-30 and Mark Adair 2-45 the best of the Holywood bowling.
Holywood were ahead in the chase around the half way point of their innings with 132 on the board but the quick loss of wickets three and four, Mark Adair (52) and Nathan Burns (37) pulled them up in their tracks.
Shane Getkate claimed 3 wickets, James Hunter and James Shannon each with 2 in the 43 run win.
Derriaghy would have been happy to see Waringstown total 218/3 off the first 40 overs but as is often the case wickets in hand is the key to success and sometimes spectacularly so.
Waringstown added 111 in the final 10, Greg Thompson with 93 but it was keeper Marcus McClean who hammered the nails in the home side's coffin with 54*, his 50 coming off only 19 balls.
His unbroken seventh wicket partnership with Kyle McCallan (33*) adding 94 runs off 48 deliveries.
Phil Eaglestone then took three quick wickets including the prized one of Craig Lewis to leave the home side tottering at 17/3. With Ross Bailey (33) providing the only resistance Gary Kidd claimed 4 wickets and Kyle McCallan the other 3.
The third Section One side in the round, Downpatrick, also suffered a chastening defeat at the hands of holders CIYMS.
CIYMS rattled up 297/7 with Chris Dougherty top scoring with 72, Ryan Hunter 57 and there were forties
from both Matt McGillivray and Jason vd Merwe as the evergreen Dale Mullan took 4-51 for Downpatrick.
Allen Coulter was in unplayable form and ended with the amazing figures of 6-6 as he routed the home side for an embarrassing 46.
The all Premier clash of CSN and North Down promised to be the match of the day certainly it promised to be the best contest but in the end it was a runaway 125 run victory for the home side.
Andre Malan was last out off the fifth ball of the CSN innings but by that time he had 140 to his name.
He tip-toed for 5 overs through the nineties and having reached his hundred savaged the North Down attack with an array of blows.
Remarkable then that Ruhan Pretorius managed to return 5-35 in the midst of this with Stuart Nelson claiming 2-39.
As if that wasn't enough to claim the MOM prize Malan then ripped out 4 of the North Down top 5 - Graham, Shields, Pretorius and Haire with only Carl Robinson (44) able to resist the onslaught.
Morgan Topping finished the job with 4-28 and the 153 run margin will be a huge disappointment for North Down.
CHALLENGE CUP QUARTER-FINALS
Holywood lost to Instonians by 43 runs.
Seapark , 9 June.
Instonians 242-8 (50.0 overs, R McKinley 58, J Shannon 44, R De Freitas 3-30, M Adair 2-45)
Holywood 199 (44.5 overs, M Adair 52, N Burns 37, P Beverland 36, S Getkate 3-30, J Shannon 2-31, J Hnuter 2-34)
Downpatrick lost to CIYMS by 251 runs.
The Meadow, 9 June.
CIYMS 297-7 (50.0 overs, C Dougherty 72, R Hunter 57, M McGillivary 48, J van Der Merwe 44, D Mullan 4-51, T Magowan 2-49)
Downpatrick 46 (20.0 overs, A Coulter 6-6 , M McGillivary 2-16)
Derriaghy lost to Waringstown by 238 runs.
Queensway, 9 June.
Waringstown 329-6 (50.0 overs, G Thompson 93, M McClean 54*, A Dennison 52, P Bell 3-42)
Derriaghy 91 (27.2 overs, R Bailey 37, G Kidd 4-19, P Eaglestone 3-18, K McCallan 3-21)
CSN beat North Down by 153 runs.
Stormont, 9 June.
CSN 278 (49.5 overs, A Malan 140, G Wilson 28, R Pretorius 5-35, S Nelson 2-39)
North Down 125 (32.5 overs, C Robinson 44, M Topping 4-28, A Malan 4-34)