My 2.2/1.5tc is identical to a new 2.2 deluxe in every way, except that the mounting plate changed from model 1.5 to 2. While the design is the same (with the exception of the availability of a Graham mount from model 2 on), the materials changed for model 2.
As such, a 1.5tc with the 2.2 bearing added becomes nearly identical to a new 2.2. Currently, you can still buy 2.2 bearing caps from Graham, but if you have a 1.5 model on which to use the bearing cap, it needs to be a 1.5t or 1.5tc (where the "t" means tungsten sideweights as used in the model 2.0/2.2 and the "c" means ceramic armwand as used in the 2.0/2.2 deluxe).
FYI, Graham's are set it and forget it if you want them to be, but there's also the option of easily swapping cartridges due to the ease of setup. Many consider one of the Graham's best features to be that minor VTA adjustments can be made precisely and repeatably. I just find the arm to be very pleasant to deal with, and never intimidating - not to mention how good it sounds...which I'm sure is partly due to the fact that cartridges are always set up properly on the arm.
Unfortunately though, I've compared it only to the Michell Tecnoarm directly, and never heard a Hadcock.
