Oh ya - and I forgot my favorite part of the job.. You took the stack of 24 copper seal washers - Put them on a piece of welding rod heated them to cherry with a torch and then dunked in water them to anneal then to get a good seal when torqued up on install. Talking about it seems like so long ago but really it wasn't - Piston engines disappeared from being a viable northern flying option very quickly - we only have one Piston engine airplane left in our fleet now when 10 years ago there were almost 20 (40 plane fleet). Customers decided one day that they needed turbines and POOF.... "old guys" like me reminisce about cleaning spark plugs.....