Before you do that have you thought of manually connecting the DS to the adjoining tracks using just pieces of wire of, if you have them, crocodile clips? Might identify a simpler fix than the drastic move you're thinking of.
For another £90 you can add a Bachmann Class 90 to the IZA's - https://www.kernowmodelrailcentre.com/p/82055/K9925-Bachmann-Class-90---Revolution-Cargowaggon-Pack
I hope Tim & Siddy have been out with their camera crew recording this unique event - https://www.dailymail.co.uk/news/article-12531239/I-thought-Id-lost-mind-12-hour-night-shift-Confused-Londoners-slam-decision-rename-Bond-Street-Burberry-Street-mark-London-fashion-week.html