Hello - I have a broken drop link and upon removing the item initially found a 1/2 inch dia. tube in the radius arm that the drop link bolts thru.   The tub was rusted - I took a look at Bentley and saw that there is supposed to be a metal tube that sits there between the two rubber doughnuts. So, I belted the tub and it falls out. However, the resulting hole in the radius arm is now about 2cm diameter.  What I can't work out is whether the radius arm has corroded badly or whether a new replacement 'tube' will fit into the 2cm dia hole i.e. all is well.  I have a couple of photos' that I can email if anyone is interested and feels qualified to comment. 

At then end of the day I'm trying to establish if my radius arm has the correct sized hole or whether it is excessively corroded. Looking a the Bentley book, the hole does look 'big' but it not a very clear picture.

Steve