Technics SL 1100A & Sl 1210MK2 ToneArm Upgrades

have you tried checked out the KAB mods and tonearms? kevin at KAB has a real good reputation among technics upgrades and TT's in general and he's often talked about on these forums.
i just picked up a goldring 1022GX cart and he mounted/aligned it onto a technics headshell. met kevin when i went to pick it up...nice guy and not shy to give you as much info as you desire. i'll be getting some mods on my 1200 in a couple months.

http://www.kabusa.com/frameset.htm?/ttables.htm

Ditto what Agypsy said. Have Kevin rewire the arms for you and get his fluid damper for the 1210MK2 - you'll be hard pressed to beat it with a good interconnect. I've run Jelco and Rega arms on the 1200 before but ultimately came back to the KAB mod'd stock arm.

The 1100A is another matter - what arm is on it? Is it the EPA-110?

I have an SL1210 M5G (better tonearm wire to start) with the KAB fluid damper and an LPGear Zupreme (probably Jelco sourced) headshell. That improved it quite a bit, but the finishing touch was wrapping the tonearm in some teflon pipe thread tape. Eliminated the upper midrange glare and relaxed the whole sound.