Time for an S1 caliper refurb kit?

[Scottd]

The front right inside pot was sticking on, I removed the caliper and worked it back an forth with a bit of silicone spray - then it was as good as new… Until a month later and it was as bad as before! Some serious shuddering, it's not even drive-able at the minute.

Is it time to replace some rubber seals etc?

I know Geary does a kit but at £55 before tax and postage that seems a bit steep!

Does anyone know exactly which AP Caliper is on the S1, because this page would seem to give me the AP 'Seal Repair Kit' part numbers -
https://www.apracing.com/products/race_ ... range.aspx
Apparently there’s a slight difference internally with the S1 & S2 caliper.

Cheers
Scott