I used to be a dealer for Pear Audio. I had a couple of customers that wanted to use tonearms w/ removeable headshells. No problem.
If you use a tonearm of the same geometry (length) and can be center post mounted, you can find a way to adapt the stock arm puck. If you need something different Pear Audio will drill a custom arm puck for you. As I recall it takes approx. 3 weeks as they come Slovenia but it's not too expensive. You are pretty much limited to 9"-10" length tonearms on the Kid Thomas. If you wanted to use a transcription-length arm you could consider making an offboard weighted pillar.
If you use a tonearm of the same geometry (length) and can be center post mounted, you can find a way to adapt the stock arm puck. If you need something different Pear Audio will drill a custom arm puck for you. As I recall it takes approx. 3 weeks as they come Slovenia but it's not too expensive. You are pretty much limited to 9"-10" length tonearms on the Kid Thomas. If you wanted to use a transcription-length arm you could consider making an offboard weighted pillar.