Ortofon A90 with Graham Phantom

If I were experiencing this problem I would be tempted to place a small amount of Blutak between the top of the cartridge and the tonearm. This should both ensure a good bond and to a slight degree lessen the effect of arm resonances on the cartridge. I can recall receiving a small amount of a similar substance for this purpose from a manufacture back in the early 90s , I cannot recall whether I ever tried it. You could take a Dremel tool and remove the offending tabs but the first suggestion is the less intrusive. In a perfect world all cartridges would be easy to align and install, but in ours things like this happen occasionally.

I was trying to be factious with the grinding off, if your tabs offend you, cast them away etc. I myself would not obsess about all three touching at the same time but then I don't spend hours aligning cartridges. I have been setting up tables since 1962 and somehow seem to get them to work. I was serious about the Blutak, it is certainly an easily reversible option. There seems to be a conflict between fastening a cartridge to the arm as tight as possible and some of the coupling devices now on the market. Mapleshade has one but I haven't seen it, there are several others. I use a Graham arm myself and have had no problems, but then I don't use a $4K cartridge. I am a relic of another age when components were suppose to be capable of being used with most other things on the market. Naive of me to expect a $4K cartridge and a $5K arm to work together.