Need some quick advice from the experts cos I don't know a LOT ABOUT p6s! Going to look at a (supposedly) good condition P6 (1977 2200) later today. I've been told its all in good nick save the rear axle which was damaged in a speed bump accident and is therefore being sold quite cheaply. The rear axle needs repairing / replacing- can this be done as a DIY job? Is it a bolt- on axle? Are second hand axles available and inexpensive? What problems might be encountered with a swap? Any advice much appreciated and needed in a hurry!