My current plan is to find some worn-out Shimano J-series finned pads I've got lying around and see if the total thickness of these refills plus Shimano's finned parts add up to a somewhere close to the thickness of a fresh Shimano G-series finless pad.
Was ordering some stuff from Wiggle and thought I'd check for heavily discounted spared and parts that might come in handy.
Got two sets of these: https://www.wiggle.co.uk/clarks-replacement-pads-shimano-xtr-1
On arrival I realised my £3 pads weren't standalone pads, they're refills for these £7 items: https://www.wiggle.co.uk/clarks-finned-disc-pads-shimano-xtr
My current plan is to find some worn-out Shimano J-series finned pads I've got lying around and see if the total thickness of these refills plus Shimano's finned parts add up to a somewhere close to the thickness of a fresh Shimano G-series finless pad.