15-16mm ply, BUT, put the chopping board under the SIDE STAND, so the bike doesn't want to go to sleep on the nearside when you hop off then move the chopping board under the centre stand with your foot, then lift.
Man! This is getting more complicated all the time! Why do you put the chopping board under the centre stand before deploying the centre stand? I don't need the extra height! In fact, I'd struggle to get the bike off the centre stand if it were any higher than normal.
I agree having the rear wheel (in my case) up on the timber board makes the bike lean a fair bit more on the side stand, but it doesn't look anywhere near toppling.
I found a very thin chopping board (about 5 mm), & after moving sone more crap out of the way it worked a treat, after the front wheel knocked over the 2.5 mtr long awning I've been meaning to put on the landcruiser for a year.
Which crashed into other stuff and knocked about a dozen other things over/off... I'd better do something about the shed 😕
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