The picture shows a partially disassembled piston cylinder for Locomotive RSH 7846. Jon Tyler and Tom Carnie are swapping out the piston rings with new, custom made, cast iron replacements having discovered serious wear on the originals. Once installed the end cover can be replaced with a new gasket. Tom’s previous experience at Inverurie Loco Works has been invaluable in overcoming the myriad of small engineering challenges that such a restoration presents.