You can FOI the radar manual but check this out first. It's an appeal filed with the Information and Privacy Commissioner. Two points to note with this appeal, first the IPC ordered Toronto police to release the radar manual and second, about two thirds down the page
the Police also state that the affected party [the manufacturer] has provided a copy of the Users Guide for public viewing at certain courts in Ontario.
In other words, you could get a peek at a similar manual through disclosure.
Now with regard to disclosure and stays. You request a detailed and complex disclosure and hope you don't get it. You also apply for an 11(b) stay which you don't have a lot of grounds to win because it's under 18 months.
When you go to court, you say, "I didn't get full disclosure." The justice will likely order disclosure which will mean an adjournment until you get the information. You then say, but wait, I've applied for an 11(b), it's taken so long, if I have to wait even longer for full disclosure, my wait for a trial will be over 18 months which produces a successful 11(b). Let's just order the stay today.
According to City of Toronto stats, an astounding 97% of people issued a ticket pay it. The provincial average is over 90%. That means most people are not fighting the ticket. I also know that most of the people going to court didn't ask for disclosure or a stay. They are hoping the cop won't show up or they want to tell their side of the story. They're going to be found guilty.
So you, representing less than 1% of people who got a ticket, are the odd person out. Most justices appreciate a chance to get into meatier constitutional arguments. Think about it, all they hear every day is "it's not my fault", or "I didn't notice the sign", or some other lame excuse. Don't be shy about demanding your constitutional rights. Even if you do loose, you have created a great basis for appeal.