So sorry to hear about and see your crash. These things do happen and in this hobby it is just a case of time before they will happen to all of our models. It just hurts more when it is a favorite one.
I too fly a Concorde from Peter Michel and I have had no trouble with the CG. In fact Peter and a gentleman named Michel Bauer built my model and since I took delivery I have removed at least 24 oz's of lead from the nose. I am amazed that yours should be so tail heavy as mine has two heavy AMT Mercury turbines in the back and no extra nose weight to balance. In fact I use Lipo's (Not heavy nicads) to balance mine. But having said this my total weight is 19kg. I think I saw somewhere on your thread a weight of 24 or 25kg. Was this with fuel???
Anyway I am sure you will rebuild this model, and I am sure it will look just as marvelous again. I am just considering if I should take the dust of mine and fly it again this weekend after a long winter break, or wait until I come back to the uk in a few weeks time. I have attached a few images to inspire your repair.
Regards Al