Thanks Cliff!

I ended up using three of the 3/4" PEX 90 degree elbows and one uni-coil for the 5/8" ID tank vent line going to the vapor reservoir.  Two elbows for the 180 degree loop, and one elbow for where the hose turns from the back panel to the quarter panel towards the vapor reservoir.  I used a uni-coil on that hose to prevent it from kinking where the hose first comes up into the cabin and then runs sideways along the back panel. 

I used two more uni-coils for the filler vent hose makes a 180 degree turn to connect the filler to the reservoir. 

I purchased the 3/4" PEX elbows from my local Lowes store, and I bought the uni-coils online from BelMetric.com (part # RHBEND23.6).  Here are some pictures of my installation. 

Edited May 9, 20186 yr by SoCalJim