Garage making work that isn't there........no need to drop the subframe, all that is required is a bit of care and attention.
I'm guessing you've taken it to Harrisons perhaps?
If you want it, I'll give you the number of a chap in Seaton Carew who will do the job with care, he is above all an enthusiast
Brian
P.S. the last arm I did, took me less than an hour and a half to complete, on my back on the drive.........doesn't always work that way though