Section aroun helix and loft

Hello, i'm newbie with grasshopper and  i was wondering if anyone could help me about one question:

i have an helix and i want to make a loft around it, lofting it around the xy vector of each point  of the division which I made on the helix.

I have the division of the helix, the section wich i have to loft, but wen y put the section in each point of the division, some secction are out of the helix "cylinder" an others are in, so i have problems making loft, this happens when the point of moving the section is a corner.

Well i have two ways to resolve it:

1) Move the section with it center, this solves the position of the sections in the helix, but when i make loft, the points order of the section are changed and the result isn't a solution.

2) Detect the sections wich are inside the "helix", and rotate it 180 degrees, well this is the best solution. The problem here, is that i've a cull pattern to separate the in and out sections, i don't know how to merge it and obtain the order wich i had before the cull pattern, i've tried different ways, but i don't know very much about information trees.

The final solution that i've found is that once i have the sections bake it and loft with rhino, but i ask for some help to make it in grasshopper to keep it working on it. ;)

Well, if anyone could helpme i'll be very grateful,

sorry for my english.

so here i place the files (sorry for the disorder) :

helix.3dm

helix1.ghx