Welcome to the Bunnings Workshop community @MikeyT. It's great to have you join us and many thanks for your question.
Let me mention @Carol_Prime and hopefully, she can answer how her panels were cut.
You should find this step-by-step guide useful: How To Cut A Bamboo Benchtop. Although it is for Bamboo, the same principals will apply when cutting any timber panel product.
We look forward to hearing all about the projects you have going on around your house and garden, and we'd encourage you to let us know if you ever need assistance or have something to share. I trust you'll find loads of inspiration within the community as our fantastic members contribute their ideas here all the time.
Top and bottom panels were straight off the shelf. All i cut were the ends. I cut them at 300mm using a piece of timber as a guild or straight line as i call it and ran my cordless ryobi circular saw straight through. Took about 5 mins.
Thanks Carol. Do you or any other members have a recommendation for 18V or 36V Ryobi circular saw for occasional DIYer like me?
36v products are normally limited to our gardening range. You'll find 18v circular saws, and my recommendation would fall with the Ryobi One+ 18V 165mm Circular Saw - Skin Only. The reasoning for that is I've had plenty of experience owning it, and it's performed admirably for every use I've had for it. It really is a great lightweight unit.
Do you have any other battery equipment which you've already invested in buying batteries for?