Kettle Joe Tip top temp fixture?

Hi, I’m in the UK, doing all my smoking on a Kettle Joe and find it hard to track down the right accessories for it, with it not being as popular as the rest of the Kamado Joe products.

I’ve seen a few reviews saying that Tip top temps are quite good at maintaining temp during a smoke and thought for the price it’s worth a go. However, I’m not sure which fixture to go with so was wondering if anyone has tried on one of these?

It’s got a 5 inch vent, with half the raised section cut out. Would the ceramic 5R kit be the right choice?

Any advice welcome! thanks!