Baffle and focuser
Astrosysteme Austria (ASA) designed and produced the entire optical tube assembly (OTA) minus the primary and secondary mirrors, but including the flat-field corrector for the prime focus. ASA calculated the OTA specifics for the parameters of my home-made mirrors. These specifics include the diameter and length of the primary and secondary baffle tubes.
Shown here is the primary baffle and intergrated focuser.
Click image to enlarge.