What year was this made?
I have an Alan RECORD CARBONIO, made in 1985, which unlike yours, has carbon seatstays and chainstays. The only aluminum on mine is the head tube, bottom bracket shell, rear brake bridge, lugs, and alu fork with alu steerer (the alu steerer broke while riding, and i replaced the fork with a Time carbon fork with steel steerer). The seatstays/bottom bracket shell are flexy as hell, unfortunately, and it ghost shifts unless in index mode (maybe Simplex Retrofriction shifters could be used as an analog shifter)