Music Hall MMF 9.3 upgrades

hey folks,

ive owned a music hall mmf 9.3 in walnut for about year now and just like any other audiophile, im constantly falling deeper into the rabbit hole. Ive scoured the internet but can't really find anyone talking of serious upgrades they've done to these tables. Ive added an xtc drop counterweight to the stock project 9cc tonearm which is flying a hana sh cartridge. My thoughts on major upgrades are the following:

Tonearm?: 
I haven't heard of anyone swapping the tonearm on these things. How much of pain would it be? would I be limited to tonearms that mount to the linn standard? has anyone done this?

Motor:
so the 15v DC motor that comes stock with the table runs a bit fast for me. Im actually thinking about downgrading my motor to the 9.1 15v AC motor and getting the music hall cruise control 2,0 speed box to give me more control over the speed. 

please share your thoughts. Im asking for a friend!

thanks!