Chuck that frame in the canal and nip to Stockport Decathlon and pick up a Triban 3, you'll be on the road the same day, not wasting hours of your life trying to get that thing rebuilt. We're more than half way through the year and the days will be getting shorter soon. Have you even checked the size of the frame? How do you know it's right for you? Why was it thrown out by its previous owner anyway? Are you sure it's not cracked or damaged?