Victor UA-7082 Arm OR Micro Seiki MA505L ...? (both fit my existing alternate 270mm hole)

I know this is a bit pedantic, but why stop now? The arm needs to work well with the cartridge, so I would make the best estimate of which of the two tonearms will work best with whatever cartridge you plan on using. I have no independent confirmation, but the Victor tonearm is probably medium mass and maybe so also is the MS tonearm. In this case, both will have slightly higher effective mass than their 9-inch counterparts. Have you seen any published (by Victor or MS) effective mass data for either? I have not. And of course the headshell (weight and composition) plays an important part in the match.

Tomic, the Triplanar CW is already decoupled from the pivot (not by a rubber bushing) and placed in the plane of the LP surface, so what does Thom do?

Without paying too much attention, my choices, I have never had resonance issues.

I will rotate several existing and future cartridges, light tracking preferred:

all at 1.25g.

AT160ML Microline/Beryllium (2nd one arrived yesterday); Shure V15Vxbody/Jico SAS/Boron; Shure 97X both OEM elliptical/aluminum and advanced stylus/boron from VAS; AT440ml Microline/Tapered Aluminum; ATTR485U Shibata, AT14Sa shibata/tapered aluminum:

at 1.5g

Grado Mono Elliptical/aluminum

my heavy trackers at 2.0g.

Sumiko Talisman S Van den Hull Line Contact on sapphire tube, AT33PTG/II Stereo MicroLinear on Boron; AT33PTG/II Mono advanced stylus/boron from VAS:

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adjusting these two arm choices on the Fly.

Not having mounted/used it, that is my open question on the Victor 7082, is it smooth enough to adjust height while playing. Does it unlock/lock smoothly and firmly, while playing. Adjust tracking force and anti-skate during play?

I unlock and change the Acos Lustre GST-801 arm height during play without hesitation, it is the smoothest height mechanism I ever used, I wish Acos Lustre made a long version.

I find the Micro Seiki is not as smooth, harder to have confidence it it being secure, so I lift the arm, release the lock, make an adjustment, lower the arm: both quick and easy, but not during play.

My friend’s Technics EPA-BP500 Base is easy, you simply turn it’s big base ring, no lock/unlock needed, but I am left handed, need to use my right hand, so I lift his arm, make an adjustment, lower the arm.

I have adjusted both tracking force and anti-skate on the Micro Seiki 505 while playing, not the Acos Lustre or Technics

I have never understood the fetish about "on the fly".  I have several modern tonearms capable of adjusting VTA on the fly based on their method for adjustment, but I would never think of adjusting VTA while playing an LP, assuming that the phrase "on the fly" means just that. It's no big deal to lift the tonearm, make an adjustment, and then lower the tonearm to resume play.  With no risk to cartridge or LP. On the other hand, I would not own any tonearm that still relies upon a grub screw at the base of the pillar to change arm height/VTA such that you have to secure the tonearm with one hand, loosen the screw, change the height, and then tighten the screw, all in order to change VTA.

It's not a fetish to ask people for their experiences, and IF it is smooth enough, it is a tremendous feature/asset. I just want to know what others here have found.

I am asking if anyone has personal experience with either of these 2 arms, and letting you know what my experiences with the few arms I have messed with.

does the Victor arm height mechanism feel secure when you lock it? has anyone found they can adjust tracking and/or anti-skate during play?

OK, seems nobody currently using these two arms.

maybe a different approach:

What Long Arm with Removable Headshell can you recommend?

on the fly not needed, but easy height adjustment desired.