Mike Woods wrote:

I think we should indicate a desire to initiate a change 
request, so people know it's coming.  And it could either come 
from WWS or from the positron source group.  We do need to generate a document to 
support the change request and we should have a small group to 
draft that, dividing up tasks.

 Document would include:
 i. physics case for 30% e+pol
 ii. technical issues with low e+pol and need to measure this
 accurately, requiring LTR spin rotator system and polarimeter 
 iii. issues for train-by-train flipping;
   - if don't have train-by-train flipping, need relative luminosity 
     monitoring to 1e-4 and need to think about impact on understanding
     polarimeter systematics iv. cost impact for adding RTL spin 
     rotator system, with and without kickers This might actually 
     come in 2 documents, first just from the physics side for items i.-iii. above.  

This physics document could be circulated to WWS, GDE, MDI Panel 
with a stated desire for a change request.  Might be good to have WWS solicit such a 
document too.