Old technology same as now

Based on my own experience, 4 joint boots parts have been obtained few months ago, deeper inspection yesterday proved that the physical property of rubber boots was not lost even 40 years later after production.

Continuous Velocity Joint constructive design had been established that time already with adequate production quality.
Hub bearing in front had been checked safe, but rear one are not though replacement parts had been obtained.

Today I'll perform the maintenance on XH200 Opel B-Vecra, replacement of pitching stopper, timing belt tensioner wheel, tensioner itself and trans-axle position sensor disassembling.

NHK this morning televised Battle of Okinawa in WW2, not a few US Army soldiers were fell into mental illness at that time, mental trauma were the reasons, also even now in Afghanistan the same phenomena happens also.

Human-being may not have enough capability to endure on excessive stimulation like that and the stable mental condition may be relatively easily destroyed by unexpected violence?