Bill Freeman wrote:

Jim,

I would recommend you replace the hard copper lines
on the bottom of the PSRU with flexible lines.  Copper
work hardens and fatigues when it vibrates, and these
lines are a likely failure point.  Hard lines should be
avoided where possible, if required they should be steel
and well supported with lots of Adel clamps, but in most
cases flex lines are safer, as long as they are replaced
every 5-10 years.

Bill
Long EZ builder & pilot
mechanical engineer

jim west wrote:

The tubes are very easy to inspect be fore each flight, besides i hope to
have new ones be fore i make 1st flight

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