Hmm, I had a Dynatech in Castorama colours regret selling that so know how you feel.
A mate of mine had the chrome one from new, but found it too heavy to race on and instead got a 753. I wish I'd had enough dosh back in those days and the forethought to have bought it off of him.
By the way, your Castorama looks like my 653 vesion, it's not on road at the moment, was built up with Dura Ace 7402 on Tubs. Have been mulling over the thought of changing the rims to HPs so good to see yours with red tyres.