Hi Chris
I don't have that scope, but do have that focuser. Sounds like you could be missing the 25mm adapter at the back.
FWIW, my image train is as follows:
Esprit 120 >
Esprit to Esatto Adapter >
Esatto 65mm Extension Tube > Esatto 3" >
Esatto M81 25mm Extension.
Then to this, I have my Field Flattener, QHY spacing, QHY Filter Wheel, and 268M. From the back of the Field Flattener to the sensor, it's 55mm (actually 56.5).
If you're not using a flattener, obviously that changes your backfocus measurements. I don't know what that is for your Tak, but you can buy extension tubes as mentioned above to get to where you need to go. I use 25mm, you can start there? Maybe get two if you need the extra spacing.
Happy to take a picture for you later.