Y-wiring= cheap...........but sounds cheap to, please forget it.
A true monocartridge gives you way much better sounding monorecords! (even of playing with the most expensive stereocart.)
If you can permit it to your self, please do it. ( you also need a big bunch of mono`s as well)
The last day`s I`ve played a bunch of bad sounding second (hand bought) Savoy mono`s. They all sound nearmint now and a way better audio quality. This amazed me, I`m a very very happy man at the moment.