I have just had the misfortune of having to replace the rear axle on my Swift Royale 630. I waited five weeks for delivery - the parts were around 1500 GBP - with labour on top to fit. The axle had to be made in Germany, shipped to Alko in Warwick who then overnighted it to my garage. There are three torsions on each side, six in total, two snapped when I went over a bump due to lack of grease. For those wanting to avoid this problem - grease the torsion bars using the grease nipples twice a year (as recommended by Alko) while the vehicle is jacked up to take the weight off the suspension otherwise the grease doesnt get far enough in. As a result of the above work, I have the old axle which includes some functional torsion bars if anyone is interested, but it is unlikely I will keep them for long due to lack of space.