Willt, Came out very nice, congrats! In the future, clamp the stand to the seat post with an aluminum frame. You can get away with gently using the TT on the pre 2.8 model Cannondales as the 3.0 and SR frames don't have butted a TT.

Older Cannondales in OEM condition are as uncommon as hen's teeth. Save all of the original parts if in the future you decide to update and then sell it. The old parts would go with the bike.

Because you mentioned weight, realistly a SR or 3.0 frame, depending on size, can be expected to weigh around 20-23 lbs.

Brad