hydraulic probably isn´t the easiest way to go
to "transport pressure" in a system, the softness and flexibility of the hoses are relevant
if you take soft hoses, they will eat the pressure by widening and they will
not allow a timely defined trigger pressure, what means you shot or you shot not at the right moment
if you take "hard" hoses to avoid this, it will be heavy, unflexible and not easy to mount on site
for a shop mounted version with predefined lenght, the lightest "hose" would be
break fluid tubes for cars, or this plastic hoses (4 and 6mm) for industrial pressurized air