Hello Peter ,
Just an FYI if you are still interested in how SiriL is used as a Processing Software Tool . They are really close to a full Release Candidate v1.0.00 but the latest seems to be behaving quite well . The SiriL Org have been adding new Videos , in English , to their Website and highlighting other Videos from Users . This one linked here is from Gary , a Canadian , and is the last in a Series he's created . Have a watch and if it looks good you can always back out and up to his Main Page and review the other Videos he's created .
John M and I are considering giving the Stacking Feature a try instead of DSS . Also of interest is the Astrometry Feature which I like a lot .
Enjoy ,
Scott................
Here's the Link...