You keep telling everyone the cartridge is the most important. It isn’t. The turntable and arm are critical to the correct functioning of the cartridge. An excellent table and arm with a cheaper cartridge will beat out a great cartridge in a weak table and or arm.
This is buils***t, i have various tunrtables such as Luxman PD-444, Victor TT-101 (working), Technics SP-10mk2, Technics SP20 and Technics SL1200mk2. The average cartridge does not sounds better on my Reed 3P "12 tonearm on SP10mk2, even if i will put the top class cartridge on relatively cheap Technics SL1200mk2 the most noticeable difference in sound is the cartridge if we’re using the same phono stage. The difference between cheap conical cartridge and any advanced design is so huge. I’m not trying to say that toneam quality is not important, but if we’re comparing two direct drive tables the better cartridge sounds better anyway (even if it’s mounted on cheaper tonearm). When i put AT-ART2000 Ltd on stock technics arm of SL1200mk2 it will sounds much better than conical denon DL-107 on Reed-3P "12 tonearm on SP10mk2 turntable for example (i remember it quite well). And Technics EPC-205c mk4 cartridge sounds amazing even on SL1200mk2 stock arm, compared to some average cartridge on tonearm with 5000 euro price tag. Of cource the great cartridge on great tonearm is even better (no doubt). I have enough cartridges to say that.
But i’m not sure what you’re calling "weak turntable", if it’s complete junk then maybe, but i gave you an example, the price difference is huge, but still the cartridge is the most important if it is matched well with the arm of no matter price (for example the stock sl1200mk2 arm cost $150 - is that junk?).