Grayson Hopes For A Quick Reaction.
The Sky cameras was on hand to beam live the fact that Preston could not take advantage of the chances that were created.
Orient took an early lead through David Mooney, but the Lilywhites soon had the score level again with a header from Jermaine Beckford.
Paul Gallagher put Preston in front from the penalty spot with 20 minutes left on the clock.
However, Orient replied late in the day to grab a share of the spoils through Chris Dagnall.
Grayson told www.pnefc.net "There was players who were left out of the team tonight, and players who were left out of the 18 completely so when you don`t play very well, those players will be first to think that they`re in with a chance on Tuesday night, [against Yeovil].
"When you`ve not played well you want to get a reaction from your players, and hopefully we`ll get that on Tuesday.'