The way I do it is to fit the motor pod intended to be used screwed tight to the chassis then stick the chassis down to a flat steel plate using magnets [i use circular saw blade!], pour the boiling water but NOT directly over the chassis until covered and then a long cool down period. This last one is achieved by pre-heating an oven to say 120c then turning off, place the tray containing the chassis/hot water in the oven and leaving over night!
Next morning you will find a rusty soup and flat chassis, works every time!
[oneofwos]
Next morning you will find a rusty soup and flat chassis, works every time!
[oneofwos]