Ah yes, the old 'neanderthal mechanic' [NM] problem, as an automotive engineer mate puts it.

A bit like the old motorcyclist joke;
Q. What does a Harley-Davidson toolkit consist of?
A. A half brick and a cold chisel; hammers are just too high-tech for a Harley. grin

As grumpy says, if there's even a suspicion that NM has had the cases split, a teardown & inspection is strongly recommended.

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."