In view of the recent discussion on differences between y2014 and y2015, and the recent posts by Jason. I was puzzled by the difference plot
that was posted today, and included as slide 3. Specifically it should have had 10- fold repetition which it does not.

Secondly I decided to review my initial estimate for material budget. As some may recall I had C++ macros to generat both TGeo geometry and Agml
template for inclusion in starsim. In the TGeo part I used a root sample package, that throws stright lines and sample material budget. The code is not identical
to what Jason has in his AgmlMaterialBudget, but seems to do all the same thing as what I used. Slide two shows the material budget for eta=0, in 0-180 deg.

Compare that to Jason plot in slide 3 and there are noticeble difference. In my analysis there are clearly two walls, as there should be see slide 1, and no dips.

So what are the differences: At least one
- in my TGeo implementation I used assemblies for the sectors, ie. not a set of containing mother volumes; otherwise there are very close.
- certainly my analysis is very repetitive as it should and have the correct average Rad lenght.
- the two set of plots may not be completely equivanet. My measure of radlenght is from r=0 ro r=9.0 cm, whereas I belive Jason is only within the PXMO
(PXL mother volume)