I just ordered the CXS18 and I was considering doing a lid swap with the new combi (not out in NA yet) and the SYS3 Attic systainer. I have seen lid parts before. I believe you just pull the two pins and the lid come right off with the older gen T-loc. I'm not sure if the SYS3 lids are the same but I did see two pins. Since they also have extra bracing in the center it might be slightly different lid swap process. I just wish Festool had the product stickers available. It would annoy me that the combi lid swap wouldn't have the stickers on the outside of the box.