I bought a second hand Puffin with COAX out due to a recent addition of a Hana MH which outputs 2mv. The controls allow you adjust the gain, which was instrumental to bringing the cart to life. It’s basically an adjustable SUT. Perfect solution to cart swapping.
Output to a Liberty DAC II it holds nothing back. Add the Magic feature to reduce minor pops on older records and it’s a multi-win product.
I’m sure the Waxwing works just as well if only more convenient.