bondmanp,
My own cartridge setup situation is the opposite of yours--my tonearm has the standard 1/2" detachable headshell, so I don't have to perform close tolerance maneuvers to get my cartridges mounted.
I will say, however that even with a detachable headshell some cartridges are easier or harder than others, As I remember it, mounting and aligning the Shelter 201 was pretty straightforward--the tonearm leads slid on easily but snugly (though that can vary with the turntable/tonearm), I didn't have to either crimp nor expand the clips I was able to mount the cartridge with some of the standard screws that came with the cartridge. Its .3x.7 mil elliptical stylus wasn't particularly fussy, either. I did the overhang/alignment consistent with my turntable (Technics SL1210 M5G) and it sounded right with no further adjustment.
You also might benefit from the customer reviews on Needle Doctor. One user put it on a Thorens TD126 MkII.
http://www.needledoctor.com/s.nl/it.A/id.7530/.f?sc=2&category=877