I'm about to take on my first infusion project, have been using prepreg and regular vacuum bagging to this point but this part is too big to fit in my oven. I'm confused as to how the resin flows from the spiral tubing into the reinforcement if the tubing is supposed to sit on top of the peel ply as all the tutorials say?

One word of caution on the use of peel ply however.  I've been using 2-inch strips of peel ply on top of my resin inlet spiral tubing to assure that the vacuum doesn't suck the bagging material between the spirals, cutting off the flow of resin to the remaining length of spiral tubing.  This has worked great to retain the rigidity and integrity of the spiral tubing resin supply channel to the part, but last night I accidentally allowed my strips of peel ply to be placed between the resin inlet manifold and the spiral.  The result was that the peel ply essentially blocked the resin from entering the spiral tubing.  I managed to save the infusion of the part, but it took some quick action and a lot of luck as I did introduce a lot of air bubbles into the bag trying to remedy the problem.  Question:  I'm using Stretchlon 200 bagging film.  It's very thin and is easily sucked between the spiral tubing, so I worry that it could cut off the flow of resin.  Should I use a different bagging film, possibly something thicker to prevent needing to place peel ply on top of my spiral tubing to prevent this problem?