Hi Willy,
I think you helped me clear something up. I was looking at a picture of the old M01/M02 which looked like it had a monoshock at the front and twin shocks at the rear.
However, it is the M-04M I am planning to buy off Tower Hobbies so I guess that means it has four shocks and the standard Tamiya CVA's should fit.
However, which is the one that it suitable for the M-4M.
1) - Tamiya CVA Mini Shock Unit 84
2) - Tamiya CVA Short Shock Unit Set II