Dan
It seems that you are correct. :( I checked my 1954-57 parts manual and the rear axle assemblies for both 107 and 109's are the same and therefore springs under the chassis rails. Which makes me wonder about this beastie:
https://www.aulro.com/afvb/images/im...09/07/1404.jpg
It is not on a S2 chassis because I was able to view the front outriggers and the rise in the chassis rails under the seatbox (which doesn't happen on s2 109 or 107 SW chassis) but it did/does have a Salisbury and I am 99.5% sure it had the spring hangers on outriggers.
Diana

