Lewm, The spindle to the center of the mounting hole distance (1 inch hole for the post) is 277 mm. I have made a new arm board for my SP10 mk2a plinth to accommodate the Schroeder LT.
I am expecting the LT in a month or two. You should have no problem mounting one on the MK3 as long as you can accommodate a normal 10.5" arm. I did have to drill a hole all the way through the whole plinth as the tonearm cable exits the bottom of the post.
The difficulty will be mounting it to TT's that can only accommodate 9" arms. They may want to eventually design a shorter version for those TT's.
I am expecting the LT in a month or two. You should have no problem mounting one on the MK3 as long as you can accommodate a normal 10.5" arm. I did have to drill a hole all the way through the whole plinth as the tonearm cable exits the bottom of the post.
The difficulty will be mounting it to TT's that can only accommodate 9" arms. They may want to eventually design a shorter version for those TT's.