The former Gers director and fellow requisitioners Malcolm Murray, Scott Murdoch and Alex Wilson are bidding to oust the board at Thursday's AGM.
And, in an open letter to supporters, he asked fans to consider six critical questions that he claims must be answered at the AGM.
It came as part of a rallying call to the Light Blue legions ahead of the make-or-break shareholder summit.
He wrote: "For the last five months we have worked tirelessly to expose what has been happening at our football club and force transparency.
"We have been successful in highlighting the key issues. By doing so we have forced board changes, but we strongly believe that there should be further change to give you the board you deserve and can fully trust.
"Members of the current board, in an effort to cling to power and distract attention from the unanswered questions, have sought to demonise us individually and collectively.
"In contrast, we have been totally transparent and have published the Rangers Constitution which we believe all board members should sign up to.
"On Thursday the club will have its first AGM in three years. We urge every one of you who own shares to come along, ask your board the questions you want answered and cast your vote.
"You, the supporters, are the lifeblood of the cub. As such you deserve answers to the following questions:
"Why does your board refuse to disclose who is behind Blue Pitch Holdings and Margarita Holdings, the original backers of Charles Green and Imran Ahmad?
"Why does your board refuse to engage with you, the supporters, apart from issuing veiled threats that if you do not continue to buy season tickets then the club will be in financial difficulty?
"Why does your board fail to acknowledge the critical need for fresh investment?
"Why does your board refuse to engage with our group, four individuals with credible business credentials and access to public and private investment to help the club and who are prepared to help the club for free?
"Why does your board continue to support Brian Stockbridge when his position is clearly untenable and who had to repay his bonus to secure the vote of Laxey?
"Why does your board continue to retain the services of Jack Irvine, a man who insulted John Greig, the greatest ever Ranger?
"Thursday's AGM is arguably one of the most important dates in the club's history.
"Your vote is critical so please make use of it. This is your chance to have your voice heard."