does anybody have experience with Scrotal Expansion?

http://www.diversifiedservices.biz/glossary.html
Scrotal Expansion -- Injecting sterile saline into the male ball sack, causing it to expand significantly.

This has been suggested to me and I've only recently heard of it and am looking for suggestions and advice.

Try a Google search. Another woman on this site suggested that I Google for information on saline breast and labial injections and it was successful (though it took two or three hours to sort out the chaff).

I took your advice and you were right about the chaff. Here's some links to sort through it.
http://www.bmezine.com/extreme/free/cmhurt/saline.html

http://www.betterbdsm.com/saline.html

http://www.bmezine.com/extreme/free/index.html

http://www.bmezine.com/spc/galleries/other/saline/

http://www.bmezine.com/extreme/free/cmhurt/labial.html

Wow! You went right to town, didn't you? Thank you for posting those links -- my filing system is a mess.

I just looked at those links. Now my balls hurt!

those sites did cause me to do a YOWZZA! and I don't even have balls - and am glad of it now!