The route all the way to the point where I am to low is all airways, R41 to SAM. I fly the WCO R41 SAM route weekly going to the CI via N866 and usuaully have few problems with staying on it. The most I get is a join via CPT rather than WCO.
This has all been very helpfull stuff thanks!
In a nutshell I should be able to fly and file the route with a radar service all the way but have to keep my eye open for the usual changes as I go?