The Superlight had the lower corners rounded all the way from the front to the back of the receiver, just like the late Citori's. I don't know about any inside lightening. The standard and Lightning had sharp corners on the lower corners of the reciever and they were rounded only at the front of the reciever for about an inch an a half or so. The Lightning had a hogged out slot in the buttstock to lighten it.
I've seen a few upgrades. A couple Midas 20g guns done by Angelo. The engraving was great, the woodwork (undoubtable done by someone else) was so-so. I dunno if I'd do an upgrade. Probably get into it about 3/4 as much or more as a real one and it'd probably be worth 1/2 as much.
