A few suggestions:
1) A friend wears specs with his helmet, and has to put the specs on after the helmet. I find this awkward as you can miss the ear (go the wrong side. And after 10mins, it's bloody painful!)
2) I wear a Caberg flip front, which actually has glasses seating. Means I just flip open the lid, and roll my head in, no drama. Much easier, IMO. If you need to replace the lid, DO get a glasses-friendly one, the difference is astonishing.
I can't agree enough with the thin arms statement. Nothing is worse and more distracting than sore ears under a lid. Your ears will need to get used to the new obstacle. When I first got a lid, I solved this by wearing the helmet a little bit every evening to break it in.
Bad luck about the specs though, as a fellow wearer, I sympathise. They're a bloody nuiscance!