@reimarc
I’m surprised / impressed you able to balance the 16g LPS on a ProJect arm, but this is probably a case of too much cartridge for your deck.
I have an LPS in my collection and felt it wasn’t a great match for a SUT - I’ve tried several, all ratios. My phono stage is a VAC Renaissance (internal SUT), which makes all my OTHER cartridges sound by far their best (especially with a better matched outboard SUT), but the LPS is the odd man out here. I would indeed be looking at an ARC Reference if I were tying to optimally match the LPS. I can hear many things the LPS does well on my Graham Phantom and Hagerman Trumpet MC, and it’s great, but not quite up to the levels I can reach with other cartridges (including lower Benzes) on my VAC phono.
The lower Benz Ebony L and Zebrawood L (not the Ruby) models are far, far easier to work with because of their normal body weight and low impedance coils with a good output level. And they sound wonderful! They’re stellar with a SUT in the range of 15x (Zebra) - 30x (Ebony). In my system the Ebony and Zebra get lots of play, while the LPS simply rests waiting for a better phono match - which quite honestly may not be happening anytime soon (I don’t have any room for both an ARC and the VAC lol).
TLDR; you should have got a Zebrawood L with 0.4mV output and 12 ohm coils (not the ruby-plate Zebra, the iron-cross one)